Khan, 30, had been linked to fighting UK rival Kell Brook and former training partner Manny Pacquiao this year, although both high-profile fights have since fallen through.
Both Brook and Pacquiao are set for mandatory defenses of their welterweight belts leaving Khan with few options and with no choice but to postpone his return.
The imminent Ramadan festival is due to begin next month and run until late June, meaning any sort of meaningful preparation would be hampered.
Despite Khan being in camp all year, the ex-super-lightweight world title holder has been forced to wait until July, at the very earliest, to announce his next move.
Add training to a summer confirmation and Khan may be out of action until October, which would see another hefty chunk of the Bolton man’s peak career lost.
Canelo Alvarez was the last man to share the ring with Khan in May 2016 as the Mexican superstar scored a crushing knockout in Las Vegas.
In a statement released on Monday, Khan said: “To give an update, I’ve just arrived back in the UK after spending nearly four months in training camp in San Francisco.
“Training with Virgil Hunter and Tony Brady has gone great and I’ve had the chance to work and focus on a lot of things that I wanted to.
“I’ve spoken with Al Haymon and there are several big fights out there which we’re working on, which I’m sure you’ll all love. I want to give fans the biggest and most meaningful fights rather than just any opponent.
“I’m feeling good and at just 30 my aim and focus is to win another world title.
“In the meantime, I’m going to keep training while I’m back home and look forward to announcing some big news for after Ramadan,” he added.