The West Ham United duo pulled out of the match with knee and hernia injuries respectively, which has drawn criticism from former Wales international Mickey Thomas.
Coleman told reporters: "I have seen Mickey's comments, he is paid to give his opinion but I don't agree.
"Collison has had a serious knee problem, not for six months or 12 months, but for two or three years, now he needs a complete rest.
"James Collins, we think, has a hernia problem which may need surgery, he can't play. He limped off in a friendly in Portugal for West Ham so he can't play."
Wales take on Bosnia-Herzegovina on Wednesday at the Parc y Scarlets, Llanelli.