Great Britain missed out on a third consecutive men's wheelchair basketball Paralympic bronze medal after losing 61-46 to the United States.
GB started nervously and struggled with their offence in the opening half, falling 29-20 behind at the interval.
But they drew level midway through the third quarter to give themselves hope.
However, the USA pulled away again towards the end of the quarter and their defence also restricted GB's shooting opportunities.
Steve Serio did much of the damage with 20 points for the USA, who avenged their
defeat to GB at the same stage four years ago.
beaten in the semi-final 69-52 by Canada,
were unable to make the most of their early opportunities and Serio, celebrating his 25th birthday, capitalised to help build up a 17-10 lead after the first quarter.
The introduction of forward Joe Chambers, who hit eight points in a row at the start of the second quarter, enabled the USA to stay in control.
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GB coach Murray Treseder
“The game is evolving and getting quicker and it is very hard to get quicker when you get to your mid-30s”
GB started the second half with far more purpose and Terry Bywater and Ian Sagar inspired the comeback to level the game at 29-29 with four minutes and 55 seconds to go in the third quarter.
But once USA coach Jim Glatch brought Joshua Turek, Matt Scott and Serio back into the game, they settled back down and dominated, forcing GB into difficult shooting positions, and it gave them a first medal in the sport since Sydney in 2000.
Afterwards, coach Murray Treseder was realistic about his British team's performance.
"We've finished fourth and that's probably where we are at the moment," he said.
"We started nervously and they got on top early on, but we made too many mistakes. I admired our fight in the third quarter but when we got back to 33-all, we made five errors and that just killed us.
"We were chasing our tail in the last quarter as we tried to get back in the game, but give the USA credit, they are a great team."
The Australian has also hinted at changes as the team look to Rio in 2016, starting with next year's European Championship in Frankfurt.
"We have an outstanding junior development programme with lots of hopeful players," he added. "The game is evolving and getting quicker and it is very hard to get quicker when you get to your mid-30s.
GB miss out on basketball bronze
"I think the standard we have seen here is quite considerable and we have got to respond to that. I think finding some new low-point players is critical for us and we will go from there."
Patrick Anderson confirmed his status as the player of the tournament as he led
The 33-year-old, who came out of retirement last year, contributed 34 points, 10 rebounds and eight assists in their 64-58 win over Australia.
Although Australia led early on, Anderson sparked the run that put Canada on top at the start the second quarter, and then helped them pull clear in the third.
"It feels like I have never won anything in my life," Anderson said on collecting his third Paralympic gold. "I feel like a little kid."