symfony
diff --git a/‎reference/forms/types/collection.rst
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+11Lines changed: 11 additions & 0 deletions b/‎reference/forms/types/collection.rst
Copy file name to clipboardExpand all lines: reference/forms/types/collection.rst
+11Lines changed: 11 additions & 0 deletions
@@ -19,6 +19,7 @@ forms, which is useful when creating forms that expose one-to-many relationships
 |             | - `allow_delete`_                                                           |
 |             | - `prototype`_                                                              |
 |             | - `prototype_name`_                                                         |
+|             | - `delete_empty`_                                                           |
 +-------------+-----------------------------------------------------------------------------+
 | Inherited   | - `label`_                                                                  |
 |             | - `label_attr`_                                                             |
@@ -335,6 +336,16 @@ If you have several collections in your form, or worse, nested collections
 you may want to change the placeholder so that unrelated placeholders are not
 replaced with the same value.
 
+delete_empty
+~~~~~~~~~~~~
+
+**type**: ``Boolean`` **default**: ``false``
+
+If you want to explicitly remove entirely empty collection entries from your
+form you have to set this option to true. However, existing collection entries
+will only be deleted if you have the allow_delete_ option enabled. Otherwise
+the empty values will be kept.
+
 Inherited options
 -----------------