Russell later posted a tweet that included a photo of him holding a glass of water.
The Celtics legend was also hospitalized in 2014 after collapsing at a speaking engagement.
Russell made it home in time Saturday to watch the Celtics lose 116-86 to the Cleveland Cavaliers in Game 3 of the NBA Eastern Conference Finals. The Celtics lead the series 2-1.
Celtics coach Brad Stevens told ESPN that he was relieved to hear that Russell was all right.
"Yeah, that was obviously scary news, and happy to hear that he's doing better and he's been released from the hospital,'' Stevens said in Cleveland before Game 3. "He's the ultimate basketball winner. The way he impacted winning, the unselfishness of a teammate, what he stood for off the floor -- everything about him.”
Russell won 11 titles with the Celtics and was named the NBA’s most valuable player five times. He was inducted into the Basketball Hall of Fame in 1975.