The outstanding Irish full-back has known for a week that his season at Spurs and therefore hopes of appearing in the world's biggest tournament were all over.
Twice winner of Player of the Year at the club, Stephen has suffered a setback in his rehabilitation from a knee injury and has now been told to rest for six to eight weeks.
Naturally devastated at the news, Stephen is now concentrating on being fit for next season.
"The end of the season has gone now," he revealed exclusively at Spurs Lodge this afternoon. "The World Cup's gone and it's now about getting myself fit and playing football again.
"I found out last week and it's a massive disappointment.
"I knew my season more or less had gone at Tottenham so I just wanted to get fit, play a couple of games and get into the World Cup squad but it's not to be for me this time."
The unfortunate thing for Stephen is that he had made progress and was hoping to appear in reserve team football as recently as last month.
"It just came on," he explained. "The original operation I had is okay. I just aggravated it and had inflammation in there and unfortunately with the knee, it takes a long time for it to settle down and you have to let it settle down or it will just keep coming back and get worse.
"I was doing well in training. I felt really, really good.
"That's the problem. You can't take anything for granted coming back from an injury because you can go from being brilliant to really poor. That's what happened with me.
"Any niggle can set you back. The surgeon said it's only a minor problem though and I now have to be patient.
"The worst thing is that there is a World Cup at the end of the season.
"It's a blow being injured again but because you miss a World Cup it makes it even harder to take.
"For the last six weeks it's been hard. One minute I think I'm going tothe World Cup, the next I don't and I've been up and down like a yo-yo. But it's not to be and I know where I stand now.
"I've got my head around it now and the most important thing is to get back playing football again.
"I have to rest now. There is nothing to rush for and I can give it a real chance. I just want to be playing again."
By Paul Miles at Spurs Lodge
Stephen Carr admits he's finally getting his head around missing out on this summer's World Cup Finals.