A 13-year-old girl presented with symptoms consistent with diabetic ketoacidosis, including polyuria, polydipsia, and lethargy. Notably, there was no history of obesity or other known risk factors for impaired glucose metabolism. Her condition was preceded by exposure to COVID-19, confirmed through RT-PCR testing despite the patient being asymptomatic. Both parents had documented COVID-19 infection. The patient responded well to standard treatment, including intravenous insulin and rehydration. By the fourth day of hospitalization, she was transitioned to subcutaneous insulin therapy along with education provided to the parents on therapeutic and nutritional management. This case highlights a rare presentation of new-onset type 1 diabetes mellitus triggered by COVID-19 infection. The potential relationship between COVID-19 and acute onset diabetes in children underscores the need for further research to understand the mechanisms involved and to optimize treatment strategies.