Photos of the crudely cut hair went viral, sparking widespread public outrage over the school's disciplinary methods.
The Narivooth School issued a public apology, stating that the responsible staff received a formal warning and that disciplinary measures would be reassessed.
The incident reignited debate about outdated grooming punishments in Thai schools, despite a recent Supreme Administrative Court ruling that overturned rigid national hairstyle regulations.
Forced haircuts remain a common disciplinary tactic in many Thai schools, with past incidents also drawing significant public condemnation.