If only one or even a few of your matches have disappeared, they've most likely ended the match or deleted their Tinder account. If they deleted their account and decide to come back to Tinder, you may see that person reappear in your card stack.

Can you tell if someone unmatched you on Tinder?

If you get unmatched from another person, you will not be able to see them without performing an account reset. Yes, you may see the other person again on your Tinder, if they reset their account. Account resets clears all those blocks and flags which helps you to see another person again.

How long before a Tinder match disappears?

If you do start chatting, you only have 14 days before your conversation vanishes. Bumble also puts a 24-hour limit on that initial hello; JSwipe matches disappear after 18 days if no one says hello; and Tinder matches never expire.