The Portal and Half-Life developer told members of the press that it would not be showing any games next month.
"Lots of folks have mailed asking about appointment times, etc., with Valve," read the email. "Well, we are not showing any titles at this year's show. So no appointment is needed."
Last year, the firm cancelled its proposed screening of Portal 2 at the Regal Theatre in favour of a cryptic "surprise" for fans.
The surprise was that founder Gabe Newell appeared at Sony's press conference and announced that Portal 2 would be available on PlayStation 3 with Steam support.
Valve is currently known to be working on real-time strategy title DOTA 2 for release this year.
> Read our review of Portal 2