Determining whether you've been blocked on Snapchat can be a bit challenging. This is because the app doesn't explicitly inform you if someone has blocked you. However, there are some signs you can use to check if someone blocks you. To give more detail, you can try searching for the person's username. If their profile doesn't show up in the search result, there are two possibilities, according to airdroid.com. It's either they have blocked you or deleted their account.