The two feuding brothers have not been on speaking terms for a while now, with their rift deepening even more since Harry released his memoir Spare.
In the book, the duke has made some sensational claims about the royals, including one where he accused William of “physically attacking him” during an altercation.
Now Mr Quinn told the Mirror: “Barring a major upset, Harry will certainly return to the UK for the Invictus games in May – it’s his baby.
“If he decides not to come, it will take some explaining, because everyone will assume it’s because he doesn’t want the awkwardness of having to meet his brother or having to choose not to meet him.”
Mr Quinn added that not coming to the UK would be worse for the duke as “no one is going to be fooled” by any excuses to avoid meeting his family.
He explained: “Not coming would be worse than finding some sort of compromise where Harry sees William for 10 minutes or comes up with some reason why he doesn’t have time to see his brother and his father and has to get back to the States quickly to be with his children.
“But no one is going to be fooled by these excuses.”
