As of my last update, Instagram does not provide a direct way to determine if someone has blocked you. However, there are a few indicators that may suggest you've been blocked:
1. **Search for the User's Profile**: Try searching for the user's profile in the Instagram app. If you can't find their profile in the search results, it's possible that they've blocked you. However, it's also possible that they've deactivated or deleted their account.
2. **Check Direct Messages**: If you previously had conversations with the user in Instagram Direct Messages, check to see if the conversation still exists. If you can't find the conversation or if it appears to be deleted, it could indicate that you've been blocked. However, it's also possible that the user has deleted the conversation or left the conversation themselves.
3. **Visit Their Profile**: If you know the username of the person you suspect has blocked you, try visiting their profile directly. If you're able to visit their profile but can't see their posts, followers, or following count, it could indicate that you've been blocked. However, it's also possible that the user has set their profile to private.
4. **Ask a Mutual Friend**: If you have mutual friends or acquaintances with the person you suspect has blocked you, you could ask them to check if the user's profile is still visible to them. If the profile is visible to others but not to you, it may suggest that you've been blocked.
5. **Try Mentioning Them in a Comment or Tagging Them in a Post**: If you try to mention the user in a comment or tag them in a post and their username doesn't appear in the autocomplete suggestions, it could indicate that you've been blocked.
It's important to remember that these indicators are not definitive proof of being blocked, as there could be other reasons why you're unable to find or interact with a user on Instagram. Additionally, blocking is a private action, and Instagram does not notify users when they've been blocked by someone else. If you suspect that you've been blocked, it's best to respect the other person's decision and refrain from further attempts to contact them.