Hurkos III was the third planet in the Hurkos planetary system. This planet was in Federation space. In 2344, Devinoni Ral, having grown uncomfortable among Humans on Earth, relocated to Hurkos III. (TNG: "The Price")
According to cut dialog from the episode, Hurkos III was a non-aligned planet.
According to the Star Trek: Star Charts ("United Federation of Plaents I"), Hurkos III was a member planet of the Federation in 2378.