Leave of absence.
If there are any reasons why you won't be able to take a part in challenges for a week or more, please let us know: write your team name and how long you will be gone. If your reasons are private and you don't want to publish them, it's okay.
If you're leaving the community and not coming back (you can always change your mind and fill out application form again), it would also be nice of you to let us know about it. Again, write your team name, feel free to keep your reasons to yourself if you don't want them to be published. :)