Open the Garmin Connect app.
Select More (bottom right).
Select Groups.
Select the name of the Group.
Select (top right).
Select Leave Group.
Select your product to confirm this information applies to you
I Am in a Garmin Connect Challenge I Did Not Accept
If you are being automatically added to challenges, it is because you are in a group. When you join a group you are also opting into challenges for that group. The only way to leave a group challenge is by contacting the group administrator or by leaving the group.
How To Leave a Garmin Connect Group
You can leave a group through your Garmin Connect™ account.