Ravi Kumar, 27, from Moradabad of Uttar Pradesh on Saturday lost contact with the balcony area, the final resting spot before climbers ascend the south summit of the mountain.
Mr Kumar successfully climbed the 8,848 meters high Mount Everest at 1:28 pm on Saturday. His climbing guide Lakpa Wongya Sherpa has also been found unconscious after suffering from frostbite at Camp IV.
Mr Kumar and the climbing guide got separated during the descent.
"The chances of his survival are slim, as more than 24 hours have elapsed since he went missing in the extreme climate," Ang Tshering Sherpa, president of Nepal Mountaineering Association.
At least five climbers have died on Everest during the current spring climbing season.
Nepal has cleared 371 mountaineers to climb Mount Everest during the current season ending this month.
Nearly 300 people have died on Mt Everest since the first ascent to the peak was made in 1953.
It is estimated that more than 200 dead bodies are still lying on the mountain.
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