This article explains how to delete Instagram comments on Android, iPhone, and computers. Removing a comment on Instagram is easy to do through the mobile app. You can delete Instagram comments you've ...

It's been there. The caveat is that you can't delete a comment after someone places a more recent reply in the thread. After that you can only edit, and the post will be flagged to reflect that.

You need to make any corrections within 15 minutes of first posting a comment.