The pair battled to a controversial draw in September.
The 27-year-old Alvarez provided urine samples in February as a part of the agreement for his second tilt at dethroning the 35-year-old Kazakh fighter and has since blamed the positive tests on contaminated meat.
Clenbuterol is sometimes illicitly mixed into livestock feed to make meat leaner.
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Alvarez has a 49-1-2 record, with his only loss coming against Floyd Mayweather in 2013, while Golovkin has won 37 of his 38 bouts with the only blemish on his record the draw against the Mexican.
(Writing by Jahmal Corner in Los Angeles; Editing by John O'Brien)
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