Click on your Team Name at the top of the page to navigate to your team page
Go to the Overview tab, select the event from the dropdown under Team Lineups.
After selecting the event lineup you wish, click the Leave Lineup button, then Confirm Leave, and you'll see a success message!
If the roster lock and registration close have passed, you will not be able to leave your lineup. No changes can be made after the deadline.
You will repeat those steps if the team is registered for multiple events.
Note that if there are only three (3) players on the event lineup at the time and one of those players leaves the lineup, the lineup will be ineligible for the event and will be deleted. The team captain should receive an email alerting them to this action and the steps they need to take to register again, which include getting at least three (3) players on the team and re-registering for the event.