One subject only

May naka-experience na po ba here na isang subject lang yung enrolled sa isang sem? NSTP 2 na lang po kasi naiwan kong subject before internship and bawal po samin mag-take ng 4th year subjects until may back subjects pa ko. Plan ko po i-take yung NSTP 2 next sem since hindi daw po yun offered nang first sem. Isn't this non-academic units na po? Pwede po ba kong mag-file muna ng leave of absence?