The Messages app on your iPhone has a Recently Deleted folder to store your deleted messages. In the folder, you can find the messages that were deleted within the last 40 days. Enter Messages and tap Filters in the top-left corner to back to the main Messages screen. To find and retrieve deleted messages on your iPhone, scroll down and look for the Recently Deleted folder. Tap to enter it. Tick the message thread that contains the deleted messages you want to restore. Tap Recover to bring back the selected messages to the main Messages app.