'I just don't need this anymore,' Montgomerie said in interviews with the Los Angeles Times and the Daily Mail of London.
The latest problem was Wednesday during his 2 and 1 loss to Scott McCarron in the Match Play Championship, when Montgomerie said he was heckled on several occasions.
As the 38-year-old Scot was leaving La Costa Resort, one fan asked him how he had played, and Montgomerie shot back, 'There's only one thing worse than losing, and that's spending another day in your country.'
McCarron said Thursday evening the heckling was overblown.
'There was only one guy who stifled a yell when Colin missed a putt on the 12th, and that was it,' McCarron said.
McCarron, who played golf at UCLA, said one of his friends congratulated him for a good shot on the 15th hole. Montgomerie, in a bunker, heard the compliment and told the man he was an idiot.
'He brings a lot of it on himself,' McCarron said.
Montgomerie was the subject of the most severe abuse at the 1999 Ryder Cup. He also has been heckled at the U.S. Open on both sides of the country, from Congressional in 1997 to Olympic Club in 1998.
He said he was heckled at La Costa about his weight and how he was enjoying the outcome of the match.
'All the usual material,' Montgomerie said. 'Without turning around, I knew I could accurately predict the appearance of these kinds of fans -- shorts, tennis shoes, T-shirt, cap on backward, holding a beer. I was correct.'
Montgomerie, who nearly didn't come to La Costa because of a back injury, is not expected to play in the United States against until the Bay Hill Invitational, the start of a stretch leading to the Masters.
He said he likely would honor his commitments this year, but probably will not return after that.
'No offense to Scott McCarron, but if this is happening to me in the first round of a tournament in such a low-key setting, what would happen to me on the 17th hole of a major?' he said. 'Would I even be allowed to take back the club? Would someone run across the green and snatch my ball away from me?
'At this point, I'm on the edge,' he said. 'There is no level playing field. I simply don't have the desire to deal with it any longer.'