1) You might investigate Payoneer and see if they support Nepal. Do note that there are some fees, and you need to evaluate whether these are worthwhile. Payoneer is essentially a debit card that looks like a U.S. bank account, and Amazon does pay into it.
2) Are you in a metro area that has any foreign banks? Even an Indian bank could probably receive EFT payments. However, check your country's laws on a citizen owning a foreign bank account.
3) If you know of another Nepalese writer who publishes through KDP, and you can contact him or her, you can ask what they're doing to solve this problem.
Best of luck.
Edit: If you go with an Indian bank, then the country for your account would be "India." If you go Payoneer, then the country would be the U.S. I think there's a recent link on how to do Payoneer in one of the recent discussions in the "Payment Issues" forum.
Edited by: Joseph M Erhardt on Nov 11, 2017 4:08 AM