Bruce Lee passed away July 20,1973. He was pronounced dead on arrival at Queen Elizabeth Hospital some where between 7:15p.m.-8:00p.m. over 30,000 mourners gathered the streets at his Hong Kong...
Yes, Bruce Bruce's mother did die. Not sure of the date, but if you watch the stand up comedy show he did in Boston, MA., he mentions having to bury his mother. :-(
He died during the filming of "The Game of Death." His death was not related to the filming. His character died in The Chinese Connection (Jing Wu men).