Contacts
Delete downloaded contacts
Contacts will be saved in Yandex Messenger even if you delete them from the address book or deny Yandex Messenger access to them. To delete contacts from Yandex Messenger:
Android
iOS
Tap 
→ Delete contacts from Yandex Messenger above the chat list.
In Yandex Messenger, tap Settings → Remove all synced contacts.
The contacts will be saved on your device and deleted from Yandex Messenger.