Red Wings goalie prospect Petr Mrazek made 52 saves to lead the Czech Republic to a 5-2 win over the United States on Friday in Edmonton.
The loss combined with Denmark's 10-1 loss to Finland later in the day to knock the United States (1-2) out of medal contention and into the relegation pool for seventh to 10th place.
"We played our best, and it still wasn't enough, which is just really upsetting," said U.S. center and Rangers prospect J.T. Miller.
The loss also assured Canada (3-0), with the Lightning's Brett Connolly, would win Pool B and get a bye to the semifinals.
The United States plays Canada tonight (8, NHL Network) as the preliminary round concludes.
"We're going to beat them," American captain Jason Zucker said. "That's what we're going to do. We're going to try our best. We're going out there and not change anything we do. We're going to play."