20th Century Fox recently shelved plans to shoot in 2012, believing that Sutherland would not have time to reprise his role as Jack Bauer during the hiatus between the first and second seasons of his new TV series Touch.
"We finally got a script to a really amazing place, and unfortunately - because of my schedule - we're trying to fit a lot of moving parts... and trying to find the right slot to do the film in," the actor told Jay Leno on The Tonight Show.
"We're still trying and if we don't get it into this slot, we'll do it next year."
Sutherland remained resolute that the 24 movie will eventually reach the big screen.
"24 was so good to me - it was an amazing experience and I think we have a responsibility to protect it," he said. "Our job is to make sure that we make the best possible movie ever and if we have to wait a little longer, we will."
Billy Ray (The Hunger Games) and Mark Bomback (Total Recall) have written the film script, while Antoine Fuqua (Training Day) was previously lined up to direct.
Watch Kiefer Sutherland discuss the 24 movie on The Tonight Show below: