Check your followers list and compare it with a previous list or screenshot
Visit the profile of the person you suspect and see whether you still follow each other
Use Instagram’s search to look for the account and confirm whether it appears in your followers
Review recent activity if you noticed a sudden drop in follower count
Use a third-party follower tracking app only if you trust it and understand the privacy risks
Compare your current followers with an exported or manually saved list from before
Ask a friend to check whether the account still follows you
Monitor follower changes over time to identify who disappeared