The ministry has suspended the Pacific Christian School's registration from the start of next term, the first time it has ever done so to a private school.
The school came under scrutiny last year, when an 11 year old stabbed another child with a pair of scissors.
Su'a has been dealing with the school, and says the move has come as a shock.
He says the sad outcome is the loss of the school's special character, as it is the only one which provides Tongan bilingual teaching.