The 27-year-old man was on a rafting trip down Nepal's Kali Gandaki river with four other tourists and they had camped on the banks before deciding to go for a swim on 22 February, police said.
"He was swept away by the river and did not have a life jacket on," said assistant sub-inspector, Padam Bahadur Khatri Chettri.
"A local fisherman alerted us about the body. It was found about one kilometre (half a mile) from his camping site," Chettri told AFP, adding that an autopsy was in process.
More than 500,000 tourists visit Nepal every year and tourism ranks as a major contributor to the economy of the impoverished Himalayan nation.
