Ontario Provincial Police are still trying to track down Kamil Pawlus.
Police say they conducted an extensive air, ground and water search since April 5, in Tiny Township. They concluded their active search efforts on Saturday.
Officers on patrol will continue to monitor that area.
The 37-year-old Kitchener man has not communicated with his family since March 30, and they are concerned for his well-being.
He's described as white, 6'1", 180 lbs. with black hair, hazel eyes and has a crooked square symbol tattoo on his upper right arm.
Police said he could be wearing a grey fleece sweater, blue jeans and light coloured runners.