The incident took place last evening when the youths, aged between 18 to 25 years, had gone to take a bath in the canal. Locals had called the police after hearing what they said were cries for help coming from the canal.
Police referred the matter to the fire department which then launched a rescue operation. However, despite several teams joining the search for the trio, the youths remained untraced till Tuesday evening.
Officials said that they may put in more resources tomorrow if the youths have not been found till then.
The youths remained unidentified as locals said that they had very recently moved to the Samai Pur Badli area and nobody properly knew their names.
The canal starts in Haryana and passes through the back- side of the Haiderpur water treatment plant. It comes under the Delhi Jal Board and supplies water to a large part of the national capital, especially north and south Delhi.