Duma is the Minister for Public Enterprises and State Investment and his party is a major coalition party in the O’Neill-Dion Government with seven MPs.
Parliament will sit at 2pm to discuss the motion which is the only business of the day.
Duma told Loop PNG that all parties to the coalition government are intact and has confidence in the prime minister.
He said the allegations for Prime Minister to step aside are before the Courts and the law enforcement agencies are dealing with him, as an individual.
"We signed an unconditional alliance agreement last year with Peoples National Congress Party led by Prime Minister to remain and nothing had changed,” Duma referred to his party’s stand.