Dummett will not be in the squad to face either Azerbaijan or Belarus next month and Giggs has been asked about the situation.
He said: "I spoke to Paul and he really wanted to concentrate on club football. I think that will be it.
"He felt that he's had a lot of hamstring problems so he just felt he wanted to make sure he was fit for Newcastle.
"That was it really.
"I've got centre-halves who are playing, and I was considering him for that centre-half position, but it's not a problem.
"Obviously he's playing in the Premier League and he's a good defender, but I've got options so it's not a problem."