Portugal-born Dier trained with the Tottenham squad today but insists he is fully committed to the Three Lions.
"I spoke to Gareth Southgate and we were in complete agreement that it was the right thing to do," he said.
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Dier wants to impress as a centre-back for Spurs
"We had an open conversation and I think he was happy that I could be so honest with him.
"If he wasn't completely fine with this, then I would never have asked because I would never want to put him in a difficult position.
"He has been fantastic with the whole situation and is really easy to talk to. I certainly would never want to give him or anyone else the wrong impression.
"It is not a case that I don't want to play for England, that couldn't be further from the truth."
Dier joined Spurs from Sporting Lisbon this summer having spent a short loan spell at Everton in 2011.
Tottenham Transfer Round up
"Obviously, I have just moved clubs and even though I represent England I have not lived here since I was really young so I am still adapting to my new environment," he added.
"I just felt that this two-week period gives me the opportunity to work on parts of my game that I have had problems with over the past two months, personal elements I need to work on both physically and on the football pitch that I think will make me a better player for both club and country in the long-term.
"It is far from a rest. This is a period where I can spend time at my new club and put a lot of work in to improve because during the season these opportunities do not come around too often for Spurs or England because of the number of games we have to prepare for.
"I will never complain to a manager about what position I play as long as I am playing.
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