Police in Norman Wells have suspended their search for Darren Whiteman.
The 20-year-old has been missing for more than a week.
"It is always a difficult decision to make and no one involved takes that responsibility lightly," said Cpl Robert Frizzell from the town's RCMP detachment.
"We wish to thank all the volunteers and support agencies who put in long hours in sometimes difficult conditions to continue this search. Our sympathy goes out to the family of Mr Whiteman."
Police have led what they termed a "large scale multi-day search" by land, air, and boat since Darren was reported missing.
Local search and rescue volunteers were joined by helpers from outside the community, RCMP officers, a police dog team, and a range of other community agencies in their unsuccessful bid to find him.
"Although the RCMP lead search is concluding it is important to note that the missing person file remains an open investigation," police stated in a news release on Thursday.
"The RCMP retains files until the missing person is located, or until the missing person reaches age 110, or when age is unknown, 92 years from the date last seen."
Darren is described as Indigenous, 5 ft 9 in tall, and of slender build, with brown eyes and black hair.
He was last seen by family members at around 11pm on Tuesday, September 11, at a cabin on Lennie Lake.