Warne said he had not ruled out a surprise comeback in the Caribbean unless it would jeopardise his longevity at Test level, where he has come off a record-breaking year.
"Whatever I want to do in Test cricket, that will dictate what happens in the World Cup," he told a press conference on Wednesday.
Warne said before the 2003 World Cup that he would stepping down from the limited-overs game after the tournament to concentrate on Test cricket.
But he then missed the competition in South Africa -- which Australia won -- after testing positive for a banned diuretic and being handed a 12-month ban.
"It would be nice I suppose to play in the World Cup, but it depends on what I want to do with my Test future," he said.
"At the moment I'm retired (from One-day cricket) and I think my Test cricket's proven to be as good as it's ever been, so if that means I can't play One-day cricket any more and it will extend my Test career then maybe that's the way it has to stay. But you never say never."
Warne has until October to make up his mind, when Australia's selectors will pick a 30-man squad.
Chairman of selectors Trevor Hohns said Warne's deadline will depend on when Australia have to lodge their player nominations with the International Cricket Council.
"We at least have to know what his intentions are going to be before then," Hohns told the Sydney Morning Herald this week.
Hohns said he had discussed the prospect of a One-day international return with Warne, although only on a "general basis on various occasions".
"There hasn't even been anything specific discussed," Hohns said. "If he was going to make himself available, we would prefer him to do it sooner rather than later."
Warne said during last week's Sydney Test he had discussed his future with leg-spin legend Richie Benaud, who encouraged him to keep going as long as he can.
"I'm not sure I can go that long. We'll wait and see," Warne said.
Benaud's belief in his fellow leg-spinner's ability and durability has clearly had a strong impact on Warne, who is now in his 15th year as a Test cricketer.
"Richie is the man, and if he wants me to try and do that I've got to do everything I possibly can to meet his expectations," Warne said.
"It's just whether the body and the mind can keep going that long."
Warne, who turns 37 in September, has played 135 Tests since his debut in January 1992, and has the world record tally of 659 wickets.
He took 96 wickets in 15 Tests in 2005, breaking the record held for 24 years by Dennis Lillee.