Everton had been trying to keep LA Galaxy star Donovan and were hoping that a potential players' strike in the MLS would keep him at Goodison Park.
But Donovan, who played his final Everton game on Saturday at Birmingham, is focusing on the MLS season - which starts in a fortnight.
Farewell: Everton's Landon Donovan applauds the fans after the final whistle at St Andrews
'Everton have made it clear they wanted me to stay but I have to respect my team in LA,' said Donavan. 'I am the captain there and it would send the wrong message not to go back.
'I would consider coming back. I could never have imagined it would go this well. But I am a member of the Galaxy and I have signed a new deal there. It is a team I love playing for and I am so excited to get back there.
Danger man: Everton's Landon Donovan goes close against Spurs
'But my guess would be that if I ever come back to the Premier League, it would be to this club.'
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