Introduction: The pandemic COVID-19 has spread over whole world and compelled the human society to maintain social distancing. The outbreak of COVID-19 has impacted students’ education across the universe. An unexpected temporary suspension of classes had become indefinite due to the severity of COVID-19 all over the world. Thus, the lockdown destroyed the schedules of every student. The students from less privileged backgrounds have experienced large negative impact due to COVID-19 outbreak. The aim of this study was to assess the impact of school life due to COVID-19 pandemic. Methods: A quantitative approach with descriptive survey design was used. The sample consists of 348 high school students, aged 11 to 16 years, were selected by convenient sampling technique. The impact of school life due to COVID-19 pandemic scale was prepared by the investigator to collect the data. Results: Descriptive and inferential statistics were tailored to analyze the data and the analyses were carried out on the basis of the objectives and hypothesis of the study. The mean score of the impact of school life due to COVID-19 pandemic was 108, median 112 and the standard deviation 20.11. The school life was moderately and severely affected at 68.6% and 22.4% respectively. There were a correlation between mean scores of curriculum and co-curricular, behavioural mean scores and ‘r’ value 0.947 and 0.921 were highly positively correlated. There were no associations with the impact of school life due to COVID-19 pandemic and selected demographic variables at 0.05 levels. Discussion: The study showed that, moderate and severe level of impact had been identified on high school students due to COVID-19 pandemic. The impact may deteriorate very badly if pandemic continues for a year.