Prime Minister Bruno Tshibala rules out new election bid by long-time president in December's postponed poll.
Kabila, whose second term officially ended in 2016, is constitutionally ineligible for December's poll, although his rivals accuse him of wanting to stay in power.
So far, he has not clearly stated whether he will step aside, despite appeals from the international community to publicly say he will not run for re-election.
But DRC Prime Minister Bruno Tshibala said on Tuesday that Kabila will respect the constitution. "The elections are going to take place without the participation of President Kabila, who will abide by the spirit and the letter of the constitution," he said in an interview on the sidelines of the International Economic Forum of the Americas conference in Montreal, Canada.