Lama Babu Sherpa has not been seen since May 14 and is presumed dead, Nepal-based Seven Summit Treks said.
Indian Prime Minister Narendra Modi arrived in Nepal Friday for a two-day visit aiming to reset strained relations between India and its small northern neighbour.
Nepal's Prime Minister Khadga Prasad Sharma Oli on Wednesday vowed to rebuild speed up reconstruction efforts during an event to mark the third anniversary of a devastating earthquake that killed 9,000 people.
A crude bomb went off outside an Indian government relief office in Nepal causing minor damage but no injuries, officials said on Tuesday, in what appeared to be a rare gesture of Nepali anger towards its giant neighbour to the south.
KP Sharma Oli, who came to power after elections in February, is leading a 45-member delegation to New Delhi, which has traditionally been the first international stop for Nepal's prime ministers.