Team USA took out its frustration on Spain in the bronze medal game of the FIBA Under-19 World Cup on Sunday.
Washington scored at least 20 points in two games and recorded one double-double.
The United States made 12 three-pointers in the game, and in their six wins in Egypt, averaged a 38 points margin of victory.
In addition to Barrett, Canada also got seven first quarter points from Lindell Wigginton, who was playing again after missing the Quarter-Finals and Semi-Finals with a concussion.
Player Blames Wimbledon Loss With Being 'Bored'
The spectators paid good money to come here and watch Wimbledon and the guy shows up and doesn't try, he can't be bothered. He added, perhaps in jest but perhaps not, that injured players in round one should get a doctor's note.
Winners of the 2013 and 2015 U19 World Cups, the US will meet Spain (5-1) in Sunday's bronze medal game at 1 p.m. EDT.
The Montverde Academy standout scored 38 points, grabbed 13 rebounds and dished out five assists to eliminate the John Calipari-coached United States of America squad and end its run at a third consecutive U19 gold medal. "It hasn't happened before and I think some of us just didn't even know what to make of it". Barrett closed out the quarter's scoring with a basket with 3.5 seconds left to cut the lead to 23-17.
A Kevin Huerter (Maryland/Clifton Park, N.Y.) basket made the score 17-4, and an Edward's, 3, followed by a basket from Huerter and 3 from Louis King (Hudson Catholic H.S./Columbus, N.J.) ballooned the US lead to 25-8 at the end of the first 10 minutes.
The US claimed third place with a comprehensive 96-72 success over Spain, while Germany finished fifth by beating Lithuania 80-74. The Americans had a 62-53 rebound advantage and grabbed 30 offensive boards leading to 22 second-chance points. He went 3-for-13 from the field, and 12-of-14 from the free throw line against Italy.
The Team USA squad fell to Canada in the FIBA U19 World Cup on Saturday afternoon, 99-87.