How do I know if I was blocked in snapchat?

Open the Snapchat app and navigate to the conversations tab by tapping the speech bubble icon at the bottom of the screen to the left of the camera snap button. If the user who you suspect blocked you isn't appearing in your Chat list despite having a recent conversation with them, that's a big clue. However, you still need to move on to the next step to confirm the block.

how to know if someone blocked you on snapchat?
Snapchat is a cool app as it gives users total control over their message history, which is why we all love it. In fact, they were the pioneers of “temporary” messages that automatically delete themselves upon viewing or after a set period. Now we see similar features in mainstream chat apps, too, such as WhatsApp