WBC super featherweight: Andres Gutierrez out of Oscar Valdez bout in Las Vegas
Gutierrez, who weighed 141 pounds, has been replaced by American Adam Lopez.
"This is absolutely a clear indication of a dangerous tactic by Gutierrez to cut weight," said WBC president Mauricio Sulaiman.
"This case will be fully investigated to its fullest consequences."
Sulaiman shared a tweet which showed Gutierrez had gained eight pounds in the past seven days.
Gutierrez would have also missed weight in the two divisions above super-featherweight.
Boxers occasionally miss weight but typically by amounts so small they can return to the scales within a couple of hours having worked off the excess.
Valdez, 28, said Gutierrez was "unprofessional", adding: "I trained hard for three months making the sacrifices, and I am very upset with him."
Event promoter Bob Arum said: "We're throwing him out of the hotel. I have seen guys two or three pounds over weight, that is still unprofessional, but to come in at 11 pounds overweight is a disgrace - I have never seen anything like it."
Former featherweight world champion Valdez's bout is the main event on a Las Vegas bill also featuring Northern Ireland's Carl Frampton.