"If you hear me say attempted coup d'etat, it's because we don't consider that things are definitive," Colonna was quoted by French media as saying.
Colonna said Macron had spoken to Bazoum on Friday and that he was in good health and should be released as a condition of restoring constitutional order.
"President Bazoum must be restored to his constitutional functions," Colonna said.
A French diplomatic source said on Thursday that the situation remained "very confused".