I started queuing up for a multiplayer match in Splatoon 3 only to realize I needed to take care of something first. How do I cancel searching for a multiplayer match?
When matchmaking first starts there should be an option to cancel by holding the - button.
The cancel button usually goes away after a few seconds and won't appear if you've queued for a rematch. If the cancel button isn't available, you can still disconnect without a penalty by closing the game from the home menu or turning on airplane mode.