Barry says that City's very own "Team Bridge" have told the left-back to listen to England manager Fabio Capello's appeal for a rethink - and not to make a decision he could one day live to regret.
"There have already been conversations between the City boys and Wayne and we would all like to see him go to the World Cup," said City and England midfielder Barry.
"We just wanted to see what his mindset is at the moment and I am sure there will be a time when we talk to him about it again. He hasn't really softened his stance so far, although he has been injured so I haven't seen him for a while.
"His thoughts were the same last time we spoke and at the end of the day the decision will be down to Wayne.
"I think we would all like to see him go to the World Cup. Time can change people's opinions and hopefully that will happen with Wayne.
"I am sure he doesn't want to sit down in a few years' time and regret anything. None of us knows what thoughts he is having, but I hope he will change his mind. World Cups don't come around very often. It might be his last chance.
"No one wants Wayne to take a decision he may one day regret, but at the same time I think we must all respect whatever he wants to do."