This article explains how to know if you have been blocked by someone on Snapchat. The instructions work for Android and iOS users.
How to Know If Someone Blocked You on Snapchat! [Updated]
Below are the best ways to determine if someone has blocked your account on Snapchat.
Check your recent conversations. The first big clue is missing chats. This step is only useful if you have sent a text message to the user who may have blocked you.
Open Snapchat and tap the Chat tab to view your list of conversations. If a recent conversation with the user doesn't appear in this list, even though you recently texted them, there's a good chance they've blocked you.