This is the third and final announcement of the 19th MHD Stability Control Workshop. The theme this year is "Fundamental understanding of plasma response to 3D fields & MHD stability control." The workshop will take place on November 3-5 in Auburn, AL following the APS-DPP Annual meeting in New Orleans. The conference hotel will be the Hotel at Auburn University & Dixon Conference Center. The workshop is organized jointly by Auburn University, Los Alamos National Laboratory, Columbia University, General Atomics, Princeton Plasma Physics Laboratory, and the University of Wisconsin-Madison.