Various reports over the weekend have linked Harewood with a move away from Upton Park but the player has also gone on record to state his desire to achieve greater things with the Hammers.
Clubs including Newcastle, Tottenham and Portsmouth are all believe to be keeping tabs on Marlon.
Pardew said on the official site, “I am not surprised to hear other clubs are interested in Marlon. He had a terrific season last year and was our most improved player. His pace, power and strike rate would be an asset to any club.
”But Marlon is not for sale. The fans love him here and he has become a hero with his many goals, not least of all the winner in our FA Cup semi final win over Middlesborough.
”He is on a long contract with us and, like the rest of the squad, is looking forward to the club's European campaign and improving on our successes of last year.”
Marlon stated in a separate statement, “The stories over the weekend were total news to me and, as far as I am concerned, nothing but speculation.
”I'm sure we'll all be fired up and raring to go, because we've now got another point to prove - we want to build on the success of last season and go one step better next year.
”I want to be a part of that, and I also want the West Ham fans to know that I am fully committed to the Club and looking forward to the new season.”