The incident occurred around 11:30pm on Wednesday
The body of Sagar Saha, 14, was recovered from a pond at Rupasdi village of Banchharampur Upazila around 8am on Monday, OC Md Alauddin Chowdhury said.
Sagar, son of Hiralal Saha, was a Grade VII student of Brindaban High School.
Sagar did not return home after he went to attend a 'puja' with friends in the village on Jan 13.
He could not be traced anywhere.
His father filed a general diary with Banchharampur Police Station.
Neighbours found the body in a pond near his house and informed the police.
Police are investigating the cause of the death, the OC said.