According to this piece on Scientology Mission: Kathmandu, Nepal" from the Scientology Site

"The first Scientology Mission was recently opened in Kathmandu, the capital of Nepal. This resulted from the work of several missionaries who went to Nepal and disseminated to Buddhist monks, delivering a number of seminars on Dianetics at an ancient Buddhist temple. Following these seminars a Dianetics counseling group was formed, which rapidly expanded and is now a Scientology Mission."

I'm not surprised that the people of Nepal are so receptive to the Scientology, as it has so much in common with Eastern religions.

There's an interesting article on that here: Scientology: Doctrine of Clarity