The actor was recently alleged to have shouted at his ex-girlfriend and Ek Tha Tiger co-star on set.
A source told Mumbai Mirror: "This is completely untrue. Salman and Katrina chose to work in the same film because there was no animosity between them.
"They got along famously during the Dublin and the Istanbul schedules. Salman cares for Katrina a lot. She is like family.
"People make up a lot of stories. Only because they couldn't keep up to their commitment of making an appearance at an awards function, rumours started flying.
"Kat has many projects lined up. She doesn't have time for silly rumours generated by the media. In fact she had to turn down Karan Johar's offer of Dostana 2 because she couldn't adjust her dates."
Director Kabir Khan has said that the former couple "look magical" together on film.
In May, Salman Khan described Kaif as the "hottest fitness instructor" after he was impressed by her exercise regime.
Watch the trailer for Ek Tha Tiger below: