1. In 'Events', click the event you want to manage:
2. Now click 'Guest List':
3. Under 'Guest Lists', click on the guest list your guest is in:
4. Click the three dots to the right of your guest's name and select 'delete':
N.B. If your guest is in multiple guest lists and you want to delete them from the whole event, you will need to follow this process for each guest list that they have been added to.