The third patch is now available for the PC version of NBA 2K15, and is around 4 GB in size. It should be pushed through automatically, but if it isn’t, be sure to restart Steam. The new update contains a few PC specific fixes, including some new config file settings to experiment with. For a complete list of patch notes, please see this bulletin.
Patch #3 has already been released for the PlayStation 4 version of NBA 2K15, and is expected to be pushed through on Xbox One very soon.
Feel free to post your thoughts on the patch, along with any issues you may be experiencing, in this thread in the NBA 2K15 section of the NLSC Forum.