Recently, some rumors have circulated pertaining to the development of Left 4 Dead 3, with some alleged sources stating it was being worked on by Valve. It sprang up as part of an HTC presentation, paired with Half-Life: Alyx, which created some speculation that it might be a VR release. However, this information is untrue. Left 4 Dead 3 is not being developed?for PS4, VR, or otherwise?as confirmed by Valve itself. IGN reached out to the developer for comment, with the intention of clearing up some of the recent claims.
Valve responded to IGN, saying:

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