What is 'sorry so late' in Latin?

The Latin equivalent of 'sorry so late' is Paenitet me fuisse serus. The Latin phrase may be translated as 'It pains me to have been late'. In the Word-by-Word translation, the verb 'paenitet' means '[it] does pain, is paining, pains'. The personal pronoun 'me' means 'me'. The verb 'fuisse' means 'to have been'. The adjective 'serus' means 'late'.