Tragedy struck Roy Jones Jr.'s family over the weekend ... as the boxing legend's son, DeAndre, died by suicide, TMZ Sports has learned.
55-year-old Jones Jr. released a statement on the heartbreaking loss on Monday ... saying, "Unfortunately, my son DeAndre took his life on Saturday."
Jones Jr. went on to say he was with DeAndre the night before his passing.
"I'm so thankful that God allowed me to come home Friday night to spend the last night of his life with me and the family," he added.