diff --git a/rules.neon b/rules.neon
index d6a7c9b9..eab49f5a 100644
--- a/rules.neon
+++ b/rules.neon
@@ -15,3 +15,5 @@ rules:
 	- mglaman\PHPStanDrupal\Rules\Drupal\ModuleLoadInclude
 	- mglaman\PHPStanDrupal\Rules\Drupal\LoadIncludes
 	- mglaman\PHPStanDrupal\Rules\Drupal\EntityQuery\EntityQueryHasAccessCheckRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRouteObjectInterfaceConstantsRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRoutingInClassMethodSignatureRule
diff --git a/src/Internal/DeprecatedScopeCheck.php b/src/Internal/DeprecatedScopeCheck.php
new file mode 100644
index 00000000..3cde039f
--- /dev/null
+++ b/src/Internal/DeprecatedScopeCheck.php
@@ -0,0 +1,22 @@
+<?php declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Internal;
+
+use PHPStan\Analyser\Scope;
+
+final class DeprecatedScopeCheck
+{
+    public static function inDeprecatedScope(Scope $scope): bool
+    {
+        $class = $scope->getClassReflection();
+        if ($class !== null && $class->isDeprecated()) {
+            return true;
+        }
+        $trait = $scope->getTraitReflection();
+        if ($trait !== null && $trait->isDeprecated()) {
+            return true;
+        }
+        $function = $scope->getFunction();
+        return $function !== null && $function->isDeprecated()->yes();
+    }
+}
diff --git a/src/Rules/Deprecations/AccessDeprecatedConstant.php b/src/Rules/Deprecations/AccessDeprecatedConstant.php
index 17e508ee..8783fa32 100644
--- a/src/Rules/Deprecations/AccessDeprecatedConstant.php
+++ b/src/Rules/Deprecations/AccessDeprecatedConstant.php
@@ -2,9 +2,9 @@
 
 namespace mglaman\PHPStanDrupal\Rules\Deprecations;
 
+use mglaman\PHPStanDrupal\Internal\DeprecatedScopeCheck;
 use PhpParser\Node;
 use PHPStan\Analyser\Scope;
-use PHPStan\Reflection\FunctionReflection;
 use PHPStan\Reflection\ReflectionProvider;
 
 class AccessDeprecatedConstant implements \PHPStan\Rules\Rule
@@ -24,16 +24,7 @@ public function getNodeType(): string
     public function processNode(Node $node, Scope $scope): array
     {
         assert($node instanceof Node\Expr\ConstFetch);
-        $class = $scope->getClassReflection();
-        if ($class !== null && $class->isDeprecated()) {
-            return [];
-        }
-        $trait = $scope->getTraitReflection();
-        if ($trait !== null && $trait->isDeprecated()) {
-            return [];
-        }
-        $function = $scope->getFunction();
-        if ($function instanceof FunctionReflection && $function->isDeprecated()->yes()) {
+        if (DeprecatedScopeCheck::inDeprecatedScope($scope)) {
             return [];
         }
 
diff --git a/src/Rules/Deprecations/SymfonyCmfRouteObjectInterfaceConstantsRule.php b/src/Rules/Deprecations/SymfonyCmfRouteObjectInterfaceConstantsRule.php
new file mode 100644
index 00000000..333a8e8a
--- /dev/null
+++ b/src/Rules/Deprecations/SymfonyCmfRouteObjectInterfaceConstantsRule.php
@@ -0,0 +1,63 @@
+<?php declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Rules\Deprecations;
+
+use Drupal\Core\Routing\RouteObjectInterface;
+use mglaman\PHPStanDrupal\Internal\DeprecatedScopeCheck;
+use PhpParser\Node;
+use PHPStan\Analyser\Scope;
+use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleErrorBuilder;
+use PHPStan\Type\ObjectType;
+
+final class SymfonyCmfRouteObjectInterfaceConstantsRule implements Rule
+{
+
+    public function getNodeType(): string
+    {
+        return Node\Expr\ClassConstFetch::class;
+    }
+
+    public function processNode(Node $node, Scope $scope): array
+    {
+        assert($node instanceof Node\Expr\ClassConstFetch);
+        if (!$node->name instanceof Node\Identifier) {
+            return [];
+        }
+        if (!$node->class instanceof Node\Name) {
+            return [];
+        }
+        $constantName = $node->name->name;
+        $className = $node->class;
+        $classType = $scope->resolveTypeByName($className);
+        if (!$classType->hasConstant($constantName)->yes()) {
+            return [];
+        }
+        if (DeprecatedScopeCheck::inDeprecatedScope($scope)) {
+            return [];
+        }
+        [$major, $minor] = explode('.', \Drupal::VERSION, 3);
+        if ($major !== '9' && (int) $minor > 1) {
+            return [];
+        }
+        $cmfRouteObjectInterfaceType = new ObjectType(\Symfony\Cmf\Component\Routing\RouteObjectInterface::class);
+        if (!$classType->isSuperTypeOf($cmfRouteObjectInterfaceType)->yes()) {
+            return [];
+        }
+
+        $coreRouteObjectInterfaceType = new ObjectType(RouteObjectInterface::class);
+        if (!$coreRouteObjectInterfaceType->hasConstant($constantName)->yes()) {
+            return [
+                RuleErrorBuilder::message(
+                    sprintf('The core dependency symfony-cmf/routing is deprecated and %s::%s is not supported.', $className, $constantName)
+                )->tip('Change record: https://www.drupal.org/node/3151009')->build(),
+            ];
+        }
+
+        return [
+            RuleErrorBuilder::message(
+                sprintf('%s::%s is deprecated and removed in Drupal 10. Use \Drupal\Core\Routing\RouteObjectInterface::%2$s instead.', $className, $constantName)
+            )->tip('Change record: https://www.drupal.org/node/3151009')->build(),
+        ];
+    }
+}
diff --git a/src/Rules/Deprecations/SymfonyCmfRoutingInClassMethodSignatureRule.php b/src/Rules/Deprecations/SymfonyCmfRoutingInClassMethodSignatureRule.php
new file mode 100644
index 00000000..f7bbe32e
--- /dev/null
+++ b/src/Rules/Deprecations/SymfonyCmfRoutingInClassMethodSignatureRule.php
@@ -0,0 +1,121 @@
+<?php declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Rules\Deprecations;
+
+use mglaman\PHPStanDrupal\Internal\DeprecatedScopeCheck;
+use PhpParser\Node;
+use PHPStan\Analyser\Scope;
+use PHPStan\Node\InClassMethodNode;
+use PHPStan\Reflection\MethodReflection;
+use PHPStan\Reflection\ParametersAcceptorSelector;
+use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleErrorBuilder;
+use PHPStan\Type\ObjectType;
+
+final class SymfonyCmfRoutingInClassMethodSignatureRule implements Rule
+{
+
+    public function getNodeType(): string
+    {
+        return InClassMethodNode::class;
+    }
+
+    public function processNode(Node $node, Scope $scope): array
+    {
+        assert($node instanceof InClassMethodNode);
+        if (DeprecatedScopeCheck::inDeprecatedScope($scope)) {
+            return [];
+        }
+        [$major, $minor] = explode('.', \Drupal::VERSION, 3);
+        if ($major !== '9' && (int) $minor > 1) {
+            return [];
+        }
+        $method = $scope->getFunction();
+        if (!$method instanceof MethodReflection) {
+            throw new \PHPStan\ShouldNotHappenException();
+        }
+
+        $cmfRouteObjectInterfaceType = new ObjectType(\Symfony\Cmf\Component\Routing\RouteObjectInterface::class);
+        $cmfRouteProviderInterfaceType = new ObjectType(\Symfony\Cmf\Component\Routing\RouteProviderInterface::class);
+        $cmfLazyRouteCollectionType = new ObjectType(\Symfony\Cmf\Component\Routing\LazyRouteCollection::class);
+
+        $methodSignature = ParametersAcceptorSelector::selectSingle($method->getVariants());
+
+        $errors = [];
+        $errorMessage = 'Parameter $%s of method %s() uses deprecated %s and removed in Drupal 10. Use %s instead.';
+        foreach ($methodSignature->getParameters() as $parameter) {
+            foreach ($parameter->getType()->getReferencedClasses() as $referencedClass) {
+                $referencedClassType = new ObjectType($referencedClass);
+                if ($referencedClassType->isSuperTypeOf($cmfRouteObjectInterfaceType)->yes()) {
+                    $errors[] = RuleErrorBuilder::message(
+                        sprintf(
+                            $errorMessage,
+                            $parameter->getName(),
+                            $method->getName(),
+                            $referencedClass,
+                            '\Drupal\Core\Routing\RouteObjectInterface'
+                        )
+                    )->tip('Change record: https://www.drupal.org/node/3151009')->build();
+                } elseif ($referencedClassType->isSuperTypeOf($cmfRouteProviderInterfaceType)->yes()) {
+                    $errors[] = RuleErrorBuilder::message(
+                        sprintf(
+                            $errorMessage,
+                            $parameter->getName(),
+                            $method->getName(),
+                            $referencedClass,
+                            '\Drupal\Core\Routing\RouteProviderInterface'
+                        )
+                    )->tip('Change record: https://www.drupal.org/node/3151009')->build();
+                } elseif ($referencedClassType->isSuperTypeOf($cmfLazyRouteCollectionType)->yes()) {
+                    $errors[] = RuleErrorBuilder::message(
+                        sprintf(
+                            $errorMessage,
+                            $parameter->getName(),
+                            $method->getName(),
+                            $referencedClass,
+                            '\Drupal\Core\Routing\LazyRouteCollection'
+                        )
+                    )->tip('Change record: https://www.drupal.org/node/3151009')->build();
+                }
+            }
+        }
+
+        $errorMessage = 'Return type of method %s::%s() has typehint with deprecated %s and is removed in Drupal 10. Use %s instead.';
+        $returnClasses = $methodSignature->getReturnType()->getReferencedClasses();
+        foreach ($returnClasses as $returnClass) {
+            $returnType = new ObjectType($returnClass);
+            if ($returnType->isSuperTypeOf($cmfRouteObjectInterfaceType)->yes()) {
+                $errors[] = RuleErrorBuilder::message(
+                    sprintf(
+                        $errorMessage,
+                        $method->getDeclaringClass()->getName(),
+                        $method->getName(),
+                        $returnClass,
+                        '\Drupal\Core\Routing\RouteObjectInterface'
+                    )
+                )->tip('Change record: https://www.drupal.org/node/3151009')->build();
+            } elseif ($returnType->isSuperTypeOf($cmfRouteProviderInterfaceType)->yes()) {
+                $errors[] = RuleErrorBuilder::message(
+                    sprintf(
+                        $errorMessage,
+                        $method->getDeclaringClass()->getName(),
+                        $method->getName(),
+                        $returnClass,
+                        '\Drupal\Core\Routing\RouteProviderInterface'
+                    )
+                )->tip('Change record: https://www.drupal.org/node/3151009')->build();
+            } elseif ($returnType->isSuperTypeOf($cmfLazyRouteCollectionType)->yes()) {
+                $errors[] = RuleErrorBuilder::message(
+                    sprintf(
+                        $errorMessage,
+                        $method->getDeclaringClass()->getName(),
+                        $method->getName(),
+                        $returnClass,
+                        '\Drupal\Core\Routing\LazyRouteCollection'
+                    )
+                )->tip('Change record: https://www.drupal.org/node/3151009')->build();
+            }
+        }
+        return $errors;
+    }
+}
diff --git a/tests/src/Rules/SymfonyCmfRouteObjectInterfaceConstantsRuleTest.php b/tests/src/Rules/SymfonyCmfRouteObjectInterfaceConstantsRuleTest.php
new file mode 100644
index 00000000..bc40c0cc
--- /dev/null
+++ b/tests/src/Rules/SymfonyCmfRouteObjectInterfaceConstantsRuleTest.php
@@ -0,0 +1,53 @@
+<?php
+declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Tests\Rules;
+
+use mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRouteObjectInterfaceConstantsRule;
+use mglaman\PHPStanDrupal\Tests\DrupalRuleTestCase;
+
+final class SymfonyCmfRouteObjectInterfaceConstantsRuleTest extends DrupalRuleTestCase
+{
+
+    protected function getRule(): \PHPStan\Rules\Rule
+    {
+        return new SymfonyCmfRouteObjectInterfaceConstantsRule();
+    }
+
+    public function testRule(): void
+    {
+        [$version] = explode('.', \Drupal::VERSION, 2);
+        if ($version === '8') {
+            $this->analyse([__DIR__.'/data/symfony-cmf-routing.php'], []);
+        } elseif ($version === '10') {
+            self::markTestSkipped('Not tested on 10.x.x');
+        } else {
+            $this->analyse(
+                [__DIR__.'/data/symfony-cmf-routing.php'],
+                [
+                    [
+                        'Symfony\Cmf\Component\Routing\RouteObjectInterface::ROUTE_NAME is deprecated and removed in Drupal 10. Use \Drupal\Core\Routing\RouteObjectInterface::ROUTE_NAME instead.',
+                        6,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                    [
+                        'Symfony\Cmf\Component\Routing\RouteObjectInterface::ROUTE_OBJECT is deprecated and removed in Drupal 10. Use \Drupal\Core\Routing\RouteObjectInterface::ROUTE_OBJECT instead.',
+                        7,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                    [
+                        'Symfony\Cmf\Component\Routing\RouteObjectInterface::CONTROLLER_NAME is deprecated and removed in Drupal 10. Use \Drupal\Core\Routing\RouteObjectInterface::CONTROLLER_NAME instead.',
+                        8,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                    [
+                        'The core dependency symfony-cmf/routing is deprecated and Symfony\Cmf\Component\Routing\RouteObjectInterface::TEMPLATE_NAME is not supported.',
+                        9,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                ]
+            );
+        }
+    }
+
+}
diff --git a/tests/src/Rules/SymfonyCmfRoutingInClassMethodSignatureRuleTest.php b/tests/src/Rules/SymfonyCmfRoutingInClassMethodSignatureRuleTest.php
new file mode 100644
index 00000000..1124b6a8
--- /dev/null
+++ b/tests/src/Rules/SymfonyCmfRoutingInClassMethodSignatureRuleTest.php
@@ -0,0 +1,53 @@
+<?php
+declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Tests\Rules;
+
+use mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRoutingInClassMethodSignatureRule;
+use mglaman\PHPStanDrupal\Tests\DrupalRuleTestCase;
+
+final class SymfonyCmfRoutingInClassMethodSignatureRuleTest extends DrupalRuleTestCase
+{
+
+    protected function getRule(): \PHPStan\Rules\Rule
+    {
+        return new SymfonyCmfRoutingInClassMethodSignatureRule();
+    }
+
+    public function testRule(): void
+    {
+        [$version] = explode('.', \Drupal::VERSION, 2);
+        if ($version === '8') {
+            $this->analyse([__DIR__.'/data/symfony-cmf-routing.php'], []);
+        } elseif ($version === '10') {
+            self::markTestSkipped('Not tested on 10.x.x');
+        } else {
+            $this->analyse(
+                [__DIR__.'/data/symfony-cmf-routing.php'],
+                [
+                    [
+                        'Parameter $object of method a() uses deprecated Symfony\Cmf\Component\Routing\RouteObjectInterface and removed in Drupal 10. Use \Drupal\Core\Routing\RouteObjectInterface instead.',
+                        10,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                    [
+                        'Parameter $provider of method b() uses deprecated Symfony\Cmf\Component\Routing\RouteProviderInterface and removed in Drupal 10. Use \Drupal\Core\Routing\RouteProviderInterface instead.',
+                        13,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                    [
+                        'Return type of method SymfonyCmfRoutingUsage\Foo::b() has typehint with deprecated Symfony\Cmf\Component\Routing\RouteObjectInterface and is removed in Drupal 10. Use \Drupal\Core\Routing\RouteObjectInterface instead.',
+                        13,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                    [
+                        'Parameter $collection of method c() uses deprecated Symfony\Cmf\Component\Routing\LazyRouteCollection and removed in Drupal 10. Use \Drupal\Core\Routing\LazyRouteCollection instead.',
+                        16,
+                        'Change record: https://www.drupal.org/node/3151009'
+                    ],
+                ]
+            );
+        }
+    }
+
+}
diff --git a/tests/src/Rules/data/symfony-cmf-routing.php b/tests/src/Rules/data/symfony-cmf-routing.php
new file mode 100644
index 00000000..3d008dcd
--- /dev/null
+++ b/tests/src/Rules/data/symfony-cmf-routing.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace SymfonyCmfRoutingUsage;
+
+class Foo {
+    public const NAME = \Symfony\Cmf\Component\Routing\RouteObjectInterface::ROUTE_NAME;
+    public const OBJECT = \Symfony\Cmf\Component\Routing\RouteObjectInterface::ROUTE_OBJECT;
+    public const CONTROLLER = \Symfony\Cmf\Component\Routing\RouteObjectInterface::CONTROLLER_NAME;
+    public const UNMAPPED = \Symfony\Cmf\Component\Routing\RouteObjectInterface::TEMPLATE_NAME;
+    public function a(\Symfony\Cmf\Component\Routing\RouteObjectInterface $object) {
+
+    }
+    public function b(\Symfony\Cmf\Component\Routing\RouteProviderInterface $provider): \Symfony\Cmf\Component\Routing\RouteObjectInterface {
+
+    }
+    public function c(\Symfony\Cmf\Component\Routing\LazyRouteCollection $collection) {
+
+    }
+}
+class Bar {
+    public const NAME = \Drupal\Core\Routing\RouteObjectInterface::ROUTE_NAME;
+    public const OBJECT = \Drupal\Core\Routing\RouteObjectInterface::ROUTE_OBJECT;
+    public const CONTROLLER = \Drupal\Core\Routing\RouteObjectInterface::CONTROLLER_NAME;
+    public function a(\Drupal\Core\Routing\RouteObjectInterface $object) {
+
+    }
+    public function b(\Drupal\Core\Routing\RouteProviderInterface $provider): \Drupal\Core\Routing\RouteObjectInterface {
+
+    }
+    public function c(\Drupal\Core\Routing\LazyRouteCollection $collection) {
+
+    }
+}