2019–20 Phoenix Suns season

The 2019–20 Phoenix Suns season was their 52nd season of the franchise in the National Basketball Association (NBA), as well as their 27th season at the Talking Stick Resort Arena, later being considered the last season playing under that name. At the conclusion of their previous season, the Suns made James Jones the team's permanent general manager, with co-interim general manager Trevor Bukstein returning to his prior assistant general manager role. With a 19–63 season over, their entire coaching staff, including head coach Igor Kokoškov, was dismissed on April 23, 2019. After a quick head coaching search, the Suns hired former New Orleans Hornets/Pelicans head coach and Philadelphia 76ers assistant coach Monty Williams as the team's new head coach on May 3, later completing their new coaching staff on June 26. After the first seven games, despite an early 25-game long suspension to star center Deandre Ayton, the Suns had their best start to a season since the 2013–14 season, and best point differential since the 2004–05 season.

The season was suspended by the league officials following the games completed on March 11 after it was reported that Rudy Gobert (and a referee by proxy) tested positive for COVID-19. During that time, the Suns put up their best record in the last five seasons at 26–39. The suspension continued all the way until July 30, with the NBA agreeing to reopen the league under a modified system behind closed doors for the best 22 teams (including the Suns) this season through a 29–1 majority vote by the NBA and a unanimous vote by the NBPA. The Suns had a shot to advance to the playoffs for the first time since the 2009-10 NBA season by reaching the Western Conference's 8th seed via this season's play-in tournament as a Seed 9 and winning the tournament there. However, their chances before that point were hurt with not only Kelly Oubre Jr. announcing he would no longer play for the rest of the season, but two other Suns players (later revealed to be Aron Baynes and Ricky Rubio, though it eventually turned into four or five different players) later confirmed to test positive for COVID-19 before the season resumed. Despite playing without key players Kelly Oubre Jr. and Aron Baynes in the resumed season, the Suns won all 8 games in the 2020 NBA Bubble, not only being the only undefeated team in the NBA bubble, but also reaching the 30-win barrier for the first time since the 2014–15 season. Still, despite them going undefeated there (having their best winning streak to end a season ever at 8 wins in a row), they would miss the playoffs for a decade straight due to the Memphis Grizzlies having the tiebreaker over Phoenix after beating the Oklahoma City Thunder and Milwaukee Bucks there, as well as the Portland Trail Blazers barely making it as the new Seed 8 of the play-in tournament, winning 134–133 over the Brooklyn Nets.

This was the last time until 2025 that the Suns would miss the playoffs.