Deleting your account - Yandex ID. Help
https://yandex.com/support/id/delete.htmlHow to delete an account To delete your account, click Delete account at the bottom of the Account management page. Note. If you use Yandex.Connect (with a non-Yandex email address), you can't delete your account yourself. Only your domain administrator can do this. After deleting it, the account is frozen for 30 days.