In April, Fepulea'i was convicted and fined $US2,500 dollars on a charge of causing actual bodily harm.
He reneged on a statement that he would resign after the decision and was instead suspended.
Prime Minister Tuila'epa Sailele Malielegaoi said the inquiry will be the first of its kind.
The committee will report back to Parliament who will make the final decision in a two thirds majority vote either to terminate the president or let him remain in the position.
