The B-2 Spirit has never been officially confirmed to have been shot down according to any credible reports. Nevertheless, there have been several crashes involving the B-2 Spirit, all attributed to accidents or mechanical failures rather than enemy fire. Below is a summary of the known incidents:
B-2 Crash Incidents:
Andersen Air Force Base, Guam (February 23, 2008)
Cause: Moisture in the aircraft’s sensors resulted in incorrect readings during takeoff, which led to a stall.
Outcome: The aircraft crashed shortly after takeoff, but both crew members ejected safely.
If you are alluding to rumors or conspiracy theories regarding a B-2 being shot down (for instance, in Serbia or over hostile territories), those claims are unfounded and lack support from any credible military or intelligence sources.