Simply put, if you erase your Instagram account, everything on it will be deleted as well. As a result, your direct messages will also be destroyed. The individuals you communicated with in a group chat or sent pictures/messages to will no longer see you there. If you don’t do that, then you could find yourself out of the Instragram® network again.
Deleting Your Instagram Direct Messages!
How to Delete Instagram Messages Permanently on Mobile With Android or iPhone
This implies that your photos, videos, Story archives, communications, likes, and followers will be permanently deleted. You won’t be able to retrieve them. It’ll appear as if your account never existed.
To remove Instagram messages from both ends, press and hold your message until it becomes highlighted, then select “Unsend.” The individual you sent the message to will not be able to view it any longer since it will be deleted from both ends. In other words, neither the individual nor you will be able to see the statement anymore.
The Instagram servers do not store your messages, so any recovery operation must be carried out on your phone. You may be able to retrieve messages if you back up your phone on a regular basis. There is nothing to recover if you don’t backup your phone. Nothing will be recovered because Instagram does not keep the communications.
Tap or hold on the conversation you’d want to remove. Tap Delete, then Delete again to confirm the removal of your message. A conversation will no longer be visible in your inbox after you’ve deleted it.