diff --git a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
index 4b64386117..14e7b521f1 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
@@ -275,6 +275,9 @@ class ViolationMapper implements ViolationMapperInterface
      */
     private function acceptsErrors(FormInterface $form)
     {
-        return $this->allowNonSynchronized || $form->isSynchronized();
+        // Ignore non-submitted forms. This happens, for example, in PATCH
+        // requests.
+        // https://github.com/symfony/symfony/pull/10567
+        return $form->isSubmitted() && ($this->allowNonSynchronized || $form->isSynchronized());
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
index 9aa75adaed..74da4aee1c 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
@@ -212,7 +212,7 @@ class ViolationMapperTest extends \PHPUnit_Framework_TestCase
         $this->assertCount(0, $grandChild->getErrors(), $grandChild->getName().' should not have an error, but has one');
     }
 
-    public function testMappingIfNotSubmitted()
+    public function testAbortMappingIfNotSubmitted()
     {
         $violation = $this->getConstraintViolation('children[address].data.street');
         $parent = $this->getForm('parent');
@@ -230,12 +230,12 @@ class ViolationMapperTest extends \PHPUnit_Framework_TestCase
 
         $this->mapper->mapViolation($violation, $parent);
 
-        $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error');
-        $this->assertCount(0, $child->getErrors(), $child->getName().' should not have an error');
-        $this->assertCount(1, $grandChild->getErrors(), $grandChild->getName().' should have one error');
+        $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
+        $this->assertCount(0, $child->getErrors(), $child->getName().' should not have an error, but has one');
+        $this->assertCount(0, $grandChild->getErrors(), $grandChild->getName().' should not have an error, but has one');
     }
 
-    public function testDotRuleMappingIfNotSubmitted()
+    public function testAbortDotRuleMappingIfNotSubmitted()
     {
         $violation = $this->getConstraintViolation('data.address');
         $parent = $this->getForm('parent');
@@ -255,9 +255,9 @@ class ViolationMapperTest extends \PHPUnit_Framework_TestCase
 
         $this->mapper->mapViolation($violation, $parent);
 
-        $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error');
-        $this->assertCount(0, $child->getErrors(), $child->getName().' should not have an error');
-        $this->assertCount(1, $grandChild->getErrors(), $grandChild->getName().' should have an error');
+        $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
+        $this->assertCount(0, $child->getErrors(), $child->getName().' should not have an error, but has one');
+        $this->assertCount(0, $grandChild->getErrors(), $grandChild->getName().' should not have an error, but has one');
     }
 
     public function provideDefaultTests()