The six-time Ballon d’Or winner and 10-time La Liga champion has publicly fallen out with club hierarchy this season, during which he managed his lowest goal tally since 2007/08.
The 33-year-old has been coy over his future in the past amid reports that he can choose to walk away from the Catalan giants for free at the end of each season.
Daily Star Sport have now taken a look at five potential destinations for the greatest player of all-time, and which side have the best chance of signing him in the coming months.
The Argentine enjoyed his time under the Spaniard at Barcelona and he could eye a reunion if he decides to leave mainland Europe during the upcoming summer transfer window.
City remain in with a chance of Champions League glory before their clash against Lyon on Saturday, and will go all out to reclaim their Premier League title next season.
Guardiola said when asked about Messi earlier this season: “I’m not going to speak about transfers until the end of the season.”
Inter Milan remain one of the biggest names in world football despite their failure to win Serie A in 10 consecutive seasons.
Antonio Conte’s men finished just a point behind Juventus last season before Maurizio Sarri lost his job, giving them a golden chance of glory when the new season begins in September.
A flurry of reports earlier this year force Conte to address links to Messi, and at that point nothing solid was in place.
He said: "We're talking about fantasy football, situations that at the moment cannot be linked to Inter. For many reasons.”
The Portugal skipper may have broken records with his goal return in the 2019/20 season but there have been doubts over his influence on their style of play.
Andrea Pirlo could in turn try to replace their highest earner should he find a new club, which could point towards Messi.
The veteran has been accused of not being brave enough to attempt to play away from Spain in the past, and Juventus would offer a fine platform for success away from Barcelona.
Newell's Old Boys
In what would be the most emotional move for Messi, he could return to Argentina with Newell's Old Boys.
The playmaker could decide to raise his family in his native country while playing for the Primera Division side, who finished 10th in the league last season.
He said on that possible move in 2019: "I have the dream of being able to play for Newell's in Argentina, but I don't know if it's really going to happen because I have a family that is ahead of my desire.”
"It's a dream I've had since I was little, but I have a family, I have three children, I live in a place that has given me everything and where I am calm and can give my children a spectacular future.”
One club that would have the cash to sanction a deal for Messi is French giants PSG.
With Neymar’s future uncertain after his pleas to return to Spain last summer, their wage budget could be reduced enough to afford a move for his former team-mate.
The Ligue 1 champions remain in with a chance of Champions League glory having reached the semi-finals, but should they slip up it could push club chiefs to go for the best player in history to boost their chances.
The future of Kylian Mbappe might also play a part, with the youngster mentioning his desire to continue to challenge himself earlier this season.
Next permanent club odds for Lionel Messi
Man City: 13/5
Inter Milan: 3/1
Any Argentinian club: 9/2
Odds as of Friday from the Betfair Exchange