Aaron J. Faulhaber, 49, of Laclede, was found dead Thursday night in about 80 feet of water near the capsizing site, according to the office.
The bodies of Jason L. Maxon, 51, of Laclede, and John R. Schulte, 59, of Sandpoint, were found Friday in about 60 feet of water, also nearby, the sheriff’s office said.
The cause of the capsizing is under investigation. The boat was pulled from the water by Wednesday; it had overturned where the river is 94 feet deep, the office said.
A sonar team from a neighboring county’s sheriff’s office helped in the search for the bodies.
Thama is about a 45-mile drive north of Coeur d’Alene, Idaho, and a 60-mile drive northeast of Spokane, Washington.