Suns coach Mike D'Antoni said on his weekly radio show Tuesday night that the story caught him by surprise.
"The trade deadline's coming up so I'm sure there's talk all over the place," he said.
"In our day and age now, you make one of those phone calls or answer a phone call everybody in the world knows about it. Other than normal business, I don't know anything that's going on."
Asked if any deal was close, D'Antoni said "No, no, no."
Marion asked to be traded before the season began but has avoided talk of the subject since then. He is set to make $17 million next season, the final year of his contract, but can opt out of the deal and become a free agent.
Suns owner Robert Sarver said two weeks ago that none of the core players would be traded this season.