Purpose: Suicide is a serious public health problem leading to premature mortality. The aim of the present study is to describe and analyze the trends of suicide rates in the Slovak Republic in 2011-2020. Methods: Trends of age-standardized suicide rates were described and incidence rate ratios of suicide were analyzed by negative binomial regression. The age-standardized rates of death by the undetermined intent and its ratio to suicide rate were calculated. Results: The overall suicide rate for the Slovak population was 7.58 per 100,000. Age-standardized suicide rate had a declining trend in the reported period, from 10.24 in 2011 to 6.65 per 100,000 in 2020. The highest suicide rate was in the oldest age groups. The male to female ratio was 6.09. The most common method of suicide in the Slovak population was hanging. The age-standardized rate of deaths by undetermined intent increased from 15.72 in 2011 to 18.46 per 100,000 in 2020. Conclusion: We observed the overall declining annual suicide mortality trends in the Slovak Republic in 2011-2020. Further investigation is necessary to understand the exceptionally high undetermined intent mortality.