GB under-20 men's coach Tim Lewis was despondent as his team missed out on the chance to play for promotion in European Championship Division B.
Lewis' team chalked up their fourth straight victory on Wednesday evening when they comfortably defeated Slovakia 82-66, but Austria's 82-78 loss against Poland meant there was a three-way tie at the top of Group F that left GB in third place on points differential.
Britain will now play for 5th -8th places despite only losing one game.
Lewis was pleased with how his team played in their win against the Slovaks.
"It was a scrappy game against a scrappy team, but we overcame our tiredness and we again played with real toughness. I'm incredibly disappointed not to be in the semi-finals as we consistently showed we deserved to be there, the guys played their hearts out.
"It's is unfortunate that there's a team with two [Austria] losses in the semi-finals, and we'll be sitting watching it with five wins from six games. I know why the competition has the system it does, but one bad day has cost us dearly."