Updated – July 30, 2019
You can always delete stored in Instagram. That is, those Bookmarked posts.
And you can do this not only from the phone, but also with a computer.
How to delete saved in Instagram
- Касаемся своего профиля
в правом нижнем углу. - Раскрываем меню
в правом верхнем углу. - Переходим в раздел “Сохранённое”
. - Open the publication.
- В правом нижнем углу поста касаемся
.
- The publication will disappear and the list, but at any time you can add it back.
How to delete a collection on Instagram?
Go to Instagram bookmarks and open the selection. In the right верхнем углу касаемся 
и выбираем пункт “Редактировать подборку”.
Next, touch “Delete Collection” and confirm the action. The selection will be deleted, but the saved publications will remain in bookmarks.
How to delete everything stored on Instagram?
Unfortunately, you cannot delete all bookmarks at a time. Have to manually, one publication.
How to delete saved photos on Instagram from a computer?
Open the web version (instagram.com) and in the upper right corner переходим в свой профиль 
.
Under the basic information, select the “Saved” tab, open публикацию и в правом нижнем углу убираем из закладок .
Video tutorial on the topic: how to delete bookmarks on Instagram.
