Wales went down 59-7 to New Zealand in Johannesburg in the third-fourth match of the first IRB Under-21 World Cup.
South Africa defeated Australia 24-21 in the final, while favourites New Zealand had to be content with third place.
The only Welsh score came from Swansea full-back Gareth Swales, who crossed for a try that Cardiff fly half Nicky Robinson converted.
New Zealand scored eight tries, all converted, and an early penalty goal.
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.