Sariev was quoted today as saying he couldn't be a member of a government he continued to criticize.
He told RFE/RL that his participation would serve no purpose.
"I think there is a big misunderstanding between authorities and the opposition," Sariev said. "It's about Kyrgyzstan's policy, its direction, the president's and the government's activities. It would be politically wrong if I go there [to the government], because one person can do nothing."
New Prime Minister Azim Isabekov is trying to fill the last posts in what will be a 14-minister line-up. An announcement about the selection of a new foreign minister is expected later today.