Coronavirus Fears Prompt Facebook Gaming, Oculus to Pull Out of GDC 2020
This year’s Game Developers Conference will be held March 16 through 20 in San Francisco

Facebook said it plans to return to GDC next year
GDC

Facebook will not be participating in this year’s Game Developers Conference, March 16 through 20 in San Francisco, due to concerns over Covid-19, more commonly known as coronavirus.