The reason behind this cancellation is obvious. Coronavirus. Similarly to GTC 2020, E3 2020 will be most likely cancelled. According to reports, an official announcement will be coming tomorrow.

My day started with investigating some E3 stuff. Ended with multiple (and I mean MULTIPLE) sources coming my way.

E3 cancelation announcement scheduled for tmw AM. I don't think it will hold the night. Many of us have been engaged by sources this evening.

Cancel your plans.

— Mike Futter (@Futterish) March 11, 2020

It will be interesting to see what publishers will do now. When will they announce their new games? Will they wait for Gamescom 2020? And speaking about Gamescom 2020, will that gaming event also get cancelled?