premature
The word 'prematuro' in Italian is used to describe something that happens before it is supposed to or before it is ready. It is often used to describe births that occur before the full term of pregnancy. In a broader context, it can be used to describe any action, event, or decision that is made or occurs too soon or without proper preparation.
Your arrival is premature.
This sentence can be used when someone arrives earlier than expected or planned.
Your training is premature.
In this sentence, the speaker is pointing out that the addressee's training is not yet fully developed or complete.
His success is not premature.
This sentence implies that the person's success has come at the right time, not too early or unexpectedly soon.