diff --git a/src/Controls/ToMany.php b/src/Controls/ToMany.php
index b57cba8..7fa8d18 100644
--- a/src/Controls/ToMany.php
+++ b/src/Controls/ToMany.php
@@ -73,8 +73,14 @@ public function load(ClassMetadata $meta, Component $component, $entity): bool
 
 		$em = $this->mapper->getEntityManager();
 		$UoW = $em->getUnitOfWork();
+		$collectionFilter = $this->mapper->getForm()->getComponentCollectionFilter($component);
 
 		foreach ($collection as $key => $relation) {
+			// entities excluded by the collection filter are not managed by this container
+			if ($collectionFilter && !$collectionFilter($relation)) {
+				continue;
+			}
+
 			// mapuj jen pri neodeslanem formulari nebo pokud nebyl radek odstranen uzivatelem
 			if (!$component->form->isSubmitted() || isset($component->getUntrustedValues('array')[$key])) {
 				if ($UoW->getSingleIdentifierValue($relation)) {
@@ -159,12 +165,18 @@ public function save(ClassMetadata $meta, Component $component, $entity): bool
 		}
 
 		$deletedCollectionEntityListener = $this->getDeletedCollectionEntityListener();
+		$collectionFilter = $this->mapper->getForm()->getComponentCollectionFilter($component);
 
 		foreach ($collection as $key => $relation) {
 			if ($collection[$key]->isNew()) {
 				continue;
 			}
 
+			// entities excluded by the collection filter are not managed by this container, so they must not be deleted either
+			if ($collectionFilter && !$collectionFilter($relation)) {
+				continue;
+			}
+
 			if (!in_array((string) $key, $received)) {
 				$deletedCollectionEntityListener?->addDeletedEntity($collection[$key]);
 				unset($collection[$key]);
diff --git a/src/Form.php b/src/Form.php
index 8cce09f..b3f653d 100644
--- a/src/Form.php
+++ b/src/Form.php
@@ -16,6 +16,7 @@ class Form extends \ADT\Forms\Form
 	protected array $componentFormMappers = [];
 	protected array $componentEntityMappers = [];
 	protected array $componentEntityFactories = [];
+	protected array $componentCollectionFilters = [];
 
 	public function getEntityManager(): ?EntityManagerInterface
 	{
@@ -95,6 +96,17 @@ public function setComponentEntityMapper(IComponent $component, Closure $entityM
 		return $this;
 	}
 
+	public function getComponentCollectionFilter(IComponent $component): ?Closure
+	{
+		return $this->componentCollectionFilters[spl_object_hash($component)] ?? null;
+	}
+
+	public function setComponentCollectionFilter(IComponent $component, Closure $collectionFilter): self
+	{
+		$this->componentCollectionFilters[spl_object_hash($component)] = $collectionFilter;
+		return $this;
+	}
+
 	public function getComponentEntityFactory(IComponent $component): ?Closure
 	{
 		return $this->componentEntityFactories[spl_object_hash($component)] ?? null;