Hunter takes over behind the bench for Alvin Gentry, who was fired Friday after the Suns struggled to a 13-28 record to start the season.
Phoenix has failed to the make playoffs in each of the past two seasons.
Hunter, who logged a 17-year playing career with Detroit, Milwaukee, the Los Angeles Lakers, Toronto and Chicago, had been serving as the Suns' player development coordinator since last year.
Jessica Simpson shares three-way kiss with friends in photo
Senate Democrats to pull all-nighter on climate change