diff -u b/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php b/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php
--- b/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php
+++ b/core/modules/field_ui/src/Form/FieldConfigDeleteForm.php
@@ -61,9 +61,9 @@
 
     if ($field_storage && !$field_storage->isLocked()) {
       $this->entity->delete();
-      // Delete the associated field storages if they are not used anymore and are
-      // not persistent.
-      if (!$this->entity->deleted && !$this->entity->isUninstalling() && $field_storage->isDeletable()) {
+      // Delete the associated field storages if they are not used anymore and
+      // are not persistent.
+      if (!$this->entity->deleted && $field_storage->isDeletable()) {
         \Drupal::entityManager()->getStorage('field_storage_config')->delete(array($field_storage));
       }
       drupal_set_message($this->t('The field %field has been deleted from the %type content type.', array('%field' => $this->entity->label(), '%type' => $bundle_label)));