News of the split follows a race row in his homeland after the 25-year-old was criticised for going out with a white woman but the relationship was defended by friends close to Bolt who described the couple as being very much in love.
But it was reported in Jamaica that the relationship was over after the two had mutually decided to split.
Bolt goes into the London Games looking to defend his 100m and 200m crowns and is also hoping to beat his own world records in both races.
Lubica, 28, emigrated to Canada when she was 14 and studied fashion design in Toronto.
She moved to Jamaica after falling in love with it on holiday and was introduced to Bolt last year through a mutual friend, reggae singer Tami Chynn.
They were said to be ‘very comfortable together’ and to favour quiet dinners over showbiz functions.
But they received a barrage of abuse after a picture of them kissing was published last month.
A source close to Bolt told The Sun: ‘He will have plenty of time for relationships. At the moment he’s concentrating on his running career and doesn’t want anything to distract from that.’
Bolt’s agent Ricky Simms said: ‘We don’t comment on athletes’ private lives.’