A report in Friday's Daily Mail linked big-spending City with a £40 million swoop for Bale, who has also been affiliated with Barcelona having recently intimated he could consider his Tottenham future if they fail to qualify for next season's Champions League.
But Mancini has cooled talk of an approach for the Wales international. He said: "Gareth Bale is a fantastic player. But I don't think he will leave a big team like Tottenham.''
Mancini confirmed he has held talks with City's hierarchy over potential summer targets, but stressed discussions are now on hold as he looks to focus on his side's final two matches of the Premier League season.
He said: "We talked about this some weeks ago. But now our focus has to be on the next two games."
City are currently top of the table on goal difference ahead of Sunday's meeting with Newcastle, with second-placed Manchester United in action at home to Swansea.