Olympic silver medallist Fred Evans has been forced out of the Commonwealth Games after having his accreditation refused.
The Welsh welterweight did not travel with his team-mates to Glasgow on Tuesday after being informed he had been denied the chance to compete based on checks completed by the Home Office and Commonwealth Games officials.
In a statement to the Press Association, Wales chef de mission Brian Davies said: "Team Wales can confirm that boxer Fred Evans has had his accreditation refused by Glasgow 2014 based on checks completed by the Home Office and the Commonwealth Games accreditation decision board.
"Sadly, he is therefore unable to compete at the Commonwealth Games.
"We have engaged in rigorous and thorough communications with all relevant bodies over the last few weeks, including putting forward two mitigation plans, unfortunately all of which have been unsuccessful.
"The key Welsh and British sporting agencies have been supportive in our attempts to get Fred to the Games and we are bitterly disappointed at the outcome.
"Fred is a world class boxer and has handled this difficult situation in a very disciplined manner, continuing to work hard in the hope of a satisfactory resolution.
"We thank him for his professionalism and wish him all the best for his future ambitions."
In April Evans admitted his part in a nightclub assault in Birmingham, for which he was ordered to pay a total of £1,085 in fines and costs but it was not immediately clear if this was the reason for the accreditation refusal.
Welsh boxing performance director James Thomas said: "Fred is the Olympic silver medallist and European champion and he wanted to come to the Games and win a gold medal.
"Obviously we were aware of his conviction earlier this year and we certainly don't condone that kind of behaviour but sport is a fantastic vehicle for rehabilitation and we hoped Fred would have been able to continue to box and improve his lifestyle through the sport.
"Fred has been aware for the last two or three weeks of the battle we have been fighting, and we have had some really good support from Sport Wales, the British Olympic Association, UK Sport and Team Wales.
"Fred has remained focused and committed in training and he has been the model professional athlete over the last three or four months.
"It is sad to see such a fantastic athlete go out when everyone would have loved to see him box. Fred is part of a close-knit team and he has wished the rest of the team well."