Thatcher has not played for Wales for almost a year

Thatcher, 29, withdrew from the Wales squad before last month's qualifiers with a damaged ankle.

But the Wales management sent its own medical team to check the injury.

"Comments and actions in the build-up to the England and Poland games have made my position within the Welsh squad untenable for the time being," he said.

"The FAW has been made aware of my feelings and no effort has been made to redress the situation.

I can only stress again the great honour and privilege I have felt to play for Wales Ben Thatcher

"Consequently I have felt forced, with much regret, to make the decision not to make myself available for the forthcoming World Cup qualifying matches (against Northern Ireland and Azerbaijan)."

Thatcher, who has won seven caps, has not yet played under new manager John Toshack because of a combination of suspension and injury.

He becomes the second Premiership player to fall out with Toshack following Robbie Savage's public spat with the Wales boss.

Left-back Thatcher played for Manchester City three days after Wales' game with Poland, but he is unhappy with suggestions that he is not committed to the Wales cause.

"I cannot prevent supporters and journalists alike from reaching their own conclusions as to my motives," Thatcher added in his statement.

"I can only stress again the great honour and privilege I have felt to play for Wales, and wish the players every success in these matches."

Toshack will name his squad on Thursday for the World Cup qualifiers with Northern Ireland (8 October) and Azerbaijan (12 October).