Image Credit: Freepik
Open the Instagram app on your Android device or iPhone.
Tap the arrow icon or the Messenger icon present at the top right corner to open your inbox.
Tap the three dots present next to your username at the top.
Tap the Select chats option.
Now, tap the circle next to chats that you want to delete.
Once you select the chats, tap Delete at the bottom.
Tap Delete to confirm.