On Snapchat, you can identify if someone has blocked you by attempting to interact with them. If you search for their username and it doesn't appear in your contacts or search results, they may have blocked you. More definitively, try sending them a snap or message—if it fails to send or shows an error, they likely blocked you. You can also check your friends list to see if they're no longer there. However, the most reliable method is attempting to view their profile: if you can't find them through search and they've vanished from your friends list, blocking is probable. One limitation is that Snapchat doesn't explicitly confirm blocks with a notification message, so you won't receive an alert. It's also worth noting that if they deleted their account entirely, the result appears similar to being blocked. If you try visiting their profile link directly and it shows "User Not Found" or similar messaging, blocking is likely. Another sign: if you previously had conversations in your chat history and suddenly cannot see their name or messages, they may have blocked you or deleted their account. Keep in mind that sometimes people removing you as a friend differs from blocking—if removed, you might still be able to search for and re-add them, whereas blocking prevents any interaction or profile visibility.