As far as I know, there is no way to do this. The subscription renewal is automated and not subject to user control, and I think also not to Adobe control, but you will have to talk to customer support to find that out. Meantime, you have 3 choices:
You can cancel any time between now and the first of December at the cost of a termination fee of 50% of what your remaining subscription would have cost you. Doing it now would be the equivalent of paying for 3 months now. If you wait until November 30th, that's half a month's fee.
You can remember to cancel it yourself on the first of December.
You can let it roll over.
Unless you expect to be totally without internet access in December, I don't see what being overseas has to do with canceling in December. Quite a few non-USA countries even have Internet cafes where you can rent time on a computer, so even if you don't have your own personal internet access, it can still be done.
TL;DR: You can't do what you're asking to do. Sorry, but there's nothing the users here can do to help you, because even if it were do-able, it would take an Adobe employee with access to user accounts and billing.