This study aims to compare changes in rates of suicidal ideation (SI) and attempts (SA) among adolescents during pre, mid and later periods of the pandemic. This study included adolescents who presented to the adolescent medicine clinic in Turkey between March-May 2019 (prepandemic = T0), March-May 2021(mid period of the pandemic = T1) and March-May 2022 (late period year of the pandemic = T2). SI and SA data were assessed through the electronic hospital records of the "HEEADSSS" inventory. The charts of 2113 adolescents were evaluated. The rates of both SI (p = .015) and SA (p = .026) were determined to be higher during the pandemic (T1+T2) compared to the pre-pandemic period, with a 1.4-fold increase in SI and a 1.5-fold increase in SA. The rates of SI did not differ according to gender, (p = .090). In contrast, SA rate was significantly higher in females (7.3%) than males (3.6%) (p = .001). This study reveals an increase in SI and SA among adolescents during the first 2years of the pandemic. In challenging times, health professionals should prioritize the identification and treatment of mental health issues, including screening for depression and suicide risk.