Two major earthquakes have hit Nepal within three weeks, leaving almost 8,500 people dead and leaving huge numbers without shelter.
"We are disappointed that our Chinooks will not be supporting the World Food Programme's request for help in distributing aid," a government spokesman said.
The three Royal Air Force Chinook helicopters had not reached Nepal but were stranded in Delhi, India, for a week after being sent to bring supplies and rescue stranded victims after the first quake on April 25.
The Nepalese government has said it was overwhelmed by the scale of the first earthquake, the deadliest to hit the country in over eight decades.
On Friday, the United Nations renewed calls for assistance to help victims stranded in remote areas accessible only by foot or helicopter, saying the implications of not acting quickly would be "severe".
"We can only expect misery, a crippling loss of dignity and the real potential for more deaths, especially in the rural and remote areas," Jamie McGoldrick, UN humanitarian coordinator for Nepal, said in a statement.
Britain said that it had contributed over 23 million pounds (USD 36 million, 31.5 million euros) in aid and that it would continue to support the relief effort.
