The document summarizes research on the negative effects of a parent's sudden death on children. Several studies found that bereaved children are more likely to experience depression, anxiety, behavioral issues, and develop long-term psychological disorders like bipolar disorder or PTSD. Children whose parent died by suicide tended to have the highest risk of depression and other mental health problems compared to those whose parent died of natural causes or accidents. The death of a parent is a traumatic experience that leaves children feeling alone, insecure, and shapes their life permanently. Long-term monitoring of bereaved children is recommended to support their mental health.