A 10-year-old Nepali girl worshipped as a living goddess, or Kumari, has lost her "divine" status for defying tradition and visiting the United States.

Sajani Shakya was installed at the age of two as the Kumari of the ancient town of Bhaktapur, near the capital Kathmandu, where she was revered by Hindus and Buddhists alike in deeply religious Nepal.

But a recent trip to the United States to promote a British-made documentary exploring Nepal's traditions and contemporary political turmoil has upset local religious leaders.

"It is wrong and against the tradition for her to go on a foreign tour without any permission," the chief of a trust that manages the affairs of Bhaktapur's Kumari tradition, Jai Prasad Regmi, told Reuters on Tuesday.

"This is impure in our tradition. We will search for a new Kumari and install her as the living goddess," Regmi said.