According to the U.S. Department of Health & Human Services, “It is estimated that about 60 percent of people who commit suicide have had a mood disorder (e.g. major depression…).”
Per Web MD, “Symptoms of depression include: apathy, changes in appetite, fatigue, loss of interest in usually pleasurable activities, low self-esteem, sexual problems, sleep disturbances, and suicidal thoughts. Women tend to be sad and emotional, whereas men tend to be irritable, aggressive, and sometimes hostile.”
If you or someone you know is in crisis and contemplating suicide, call 911, go to the Emergency Room, and/or call the National Suicide Prevention Hotline, which is available 24/7 at (800) 273-8255.
Sources:
https://www.webmd.com/depression/guide/depression-in-special-situations