What NBA record for after being down 3-0 in a playoff series?

As of October 2023, the only NBA team to come back and win a playoff series after being down 3-0 is the Boston Celtics, who accomplished this feat in the 2004 Eastern Conference First Round against the New Jersey Nets. The Celtics won the series in seven games, marking a historic moment in NBA playoff history. Since then, no other team has successfully overcome a 3-0 deficit in a playoff series.