The German manager does not regret taking the Leeds United job.
Leeds make the trip to Rosler's Fleetwood Town in a League Cup first-round clash this evening.
They had, however, lost three successive league games prior to his dismissal in a run of form which left Leeds 18th in the Championship.
Steve Evans - who has since been sacked and replaced with Garry Monk - succeeded the 47-year-old and led United to a 13th-placed finish last term.
Rosler, who was the fourth managerial appointment by owner Massimo Cellino in a ruthless first year from the Italian, would have known what he was getting into at the time, but the Fleetwood boss insists that Leeds' status as a club makes it hard to regret his reign.
"I never have any regrets about taking (a job at a) club like Leeds United," he said to The YEP.
"When you are an ambitious coach or manager and you get offered that job and you are not taking it, in the later stages of your life you will have regrets.
“It was a long time ago now, it’s coming up to a year ago, and I moved on and the club moved on. I have no problems with that. I had a good time and I really enjoyed my work there.”
Monk is expected to pick up his first win as Leeds boss tonight, after losing 3-0 to QPR in their Championship curtain raiser on Sunday.