Let's say, hypothetically, that you enter the pattern for a small, non-towered airport (my local one, 3DW, may be a good example.) But as you get into the pattern you find out that the runway is occupied by another craft and, for whatever reason the runway will probably be occupied for another 20 minutes, much longer than it will take you to complete the pattern. So you'll have to delay landing.
But you've already entered the pattern, so what should you do? Is there a standard holding pattern for small airports that incorporates parts of the pattern (maybe some little loop where the base leg and downwind meet)? Or do you just fly away form the airport a bit and make up your own holding pattern?