In general to clear a course you are given a perfect timeframe. For example if you are in a 3years BSc course then you have a chance to complete the course in 5 years. After 5 years it isn't valid.

So the course you are enrolled in also have a maximum year frame. So if you miss the final year then you can complete the course anytime between the maximum timeframe.

I hope my answer helps. All the very best for your future endeavors!