Aim: The aim of the study is to try growth modification in late pubertal growth. Introduction: In the given case report, clinician tried tandem appliance for correcting skeletal class III malocclusion in a patient on the verge of growth completion. Case report: A 12-year-old female patient with maxillary deficiency was treated with growth modulation therapy for maxillary advancement. Residual growth potential was fully utilized and facial harmony was established for future. Conclusion: Class III malocclusion in adolescents is challenging to treat. Incidence of class III malocclusion is <5% among Indian population, and lack of awareness creates difficulties in its treatment options. If a growing patient reports on time with the complaint of sunken face appearance or cross-bite, the clinician may treat the patient very well with relevant treatment options. Because of lack of awareness, the patient with Class III malocclusion reported after completion of growth. This situation reduces available treatment modalities. Clinical significance: We are reporting a case of a female patient with class III malocclusion at the end of growth completion. Treatment modalities tried at the end of growth were found to be effective. Chin cap was given to the patient to prevent relapse from any possible remaining growth of mandible.