Jamaican Prime Minister Andrew Holness told William clearly in front of rolling television cameras that the nation would “carry on” as an independent country.
“I know this tour has brought an even sharper focus to questions about the past and the future,” the Duke of Cambridge said in a statement at the end of the tour on Saturday.
“In Belize, Jamaica and the Bahamas, it’s up to the people to decide that future.”
William added that he and his wife are “committed to service” and that meant “not telling people what to do” but “serving them and supporting them.”
Barbados officially declared itself a republic in November.
Belize, Jamaica and the Bahamas – all stops on the royal tour – are said to be considering such a move.
The Commonwealth, a federation of 54 mostly former British colonies, is governed by Queen Elizabeth II.
In 2018, their leaders officially announced that their son and heir, Prince Charles, would take on the role when he becomes king.
But William, second in line to the throne, said that “whoever chooses the Commonwealth to lead their family in the future is not what I have in mind”.
“What is important to us is the potential of the Commonwealth family to create a better future for the people who make it up and our commitment to serve and support as best we can,” he added.
The Duke of Cambridge’s comments have sparked debate on social media, with some people wondering if he has withdrawn his support for his father to become the next Commonwealth leader.