The death of John Wall's mother took a massive toll on him ... to the point the NBA star put a gun to his head twice, contemplating suicide.
The former Wizards guard made the shocking revelation on The OGs podcast with ex-NBA stars Udonis Haslem and Mike Miller ... saying he struggled badly when his mom died of breast cancer in 2019.
"My mom was my best friend," the 33-year-old said.
"I put a gun to my head twice and a lot of people that are close to me, friends at the time didn't know.