According to Lakers.com, the team has sent Zubac down to the Los Angeles D-Fenders:
The Los Angeles Lakers have assigned center Ivica Zubac to the Los Angeles D-Fenders, it was announced today.
Zubac, who was selected 32nd pick in the second round of the 2016 NBA Draft, has played in three games for the Lakers this season. The rookie center filled in for the injured Timofey Mozgov in his first NBA start against Dwight Howard and the Atlanta Hawks on the team’s first road trip.
Since his debut, Zubac has appeared in two other games.