A complaint, filed last month, related to two dates in February on which Alvarez submitted out-of-competition samples that were positive for Clenbuterol, a banned substance that helps burn fat and increase lean muscle mass.
Golovkin though, still plans on defending his belts as a number of replacement opponents have been considered from the likes of Gary O'Sullivan and Sergiy Derevyanchenko, though none of the available options are particularly big names in boxing, resulting in the fight now taking place at the StubHub Center in Carson, California, notably not on pay-per-view anymore.
Should Triple G beat Martirosyan (36-3-1, 21 KOs), the rematch with Alvarez likely will take place later in the year.
The bout was confirmed by HBO Boxing, which will air the event. It's a good show for L.A. Cinco De Mayo.
The Mexican middleweight, 27, said eating contaminated meat was the reason he tested positive for clenbuterol on 17 and 20 February.
Gennady Golovkin is on a collision course with history as he closes in on the record for most consecutive middleweight world title defenses and he aims to make that mark either with or without Saul "Canelo" Alvarez.
Team Golovkin is now pursuing fight options for what would be a record-tying twentieth defense of the middleweight title- a record set by long-time 160 lb. champ, Bernard Hopkins in 2005.
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Alvarez is due to face the Nevada State Athletic Commission (NSAC) today but he has been provisionally suspended for the infraction.
Gennady Golovkin getting stripped of the IBF title would be a blow to his hopes of unifying the middleweight division.
The ruling does, however, mean that Alvarez will be free to fight again in August - raising the possibility of a rescheduled Golovkin fight in September.
Joshua's promoter Eddie Hearn said yesterday that he wants to stage the fight on September 15 at Wembley.
"I am truly shocked about what has happened, and for those who have doubts and suspicions about my integrity I have always been and always will be a clean fighter", Alvarez said.
But with Alvarez suspended there was too little time between the hearing and the fight do promoters chose to cancel the bout.