Several reports suggested Vermaelen had agreed to move to Old Trafford after the World Cup, where he is currently representing Belgium.
But he has now scotched talk of any move, insisting that he is purely focused on helping his country to glory in Brazil.
He told Sky Sports: "I know there has been a lot of talk and a lot of rumours but the only thing I can say is that it's not true.
"Everybody understands my situation at Arsenal and that I have one year left.
"I understand that people are going to talk but I am here in Brazil and I am enjoying my time and I'm focused on what I am doing."
However, Vermaelen refused to comment when asked if he had held talks with manager Arsene Wenger over his future.
"We talk a lot when I am at Arsenal but it's not what I am going to discuss here,” he added. “It is something you are going to have to ask him.”
United remain on the lookout for defensive reinforcements, with Nemanja Vidic, Rio Ferdinand and Alexander Buttner all set to leave the club this summer.