Mulumbu drops DR Congo to focus on West Brom
He missed Saturday's African Nations Cup 2012 Group Five qualifier against Cameroon in Garoua - but will review the situation with his country again in December, with the next qualifier not until March against Mauritius.
"I have had a word with the president of the federation and at the moment I have told him I am focussed on the Premier League season because it is my first full one," Mulumbu told the WBA website.
"We are going to talk again in December and I will give him an answer.
"I stopped playing for my country at first because of disorganisation but after that we had a word and I told him that this year I need to focus on West Brom.
"We need to stay in the Premier League and it's a big season in a big league.
"There is high intensity and I need some rest because I run a lot.
"I think he understood that, which is why he said we will talk again in December when I will let him know how it is going."