Despite it not being showcased at E3, Crystal Dynamics have stated that the PS4 release of Rise of the Tomb Raider is still on course for release this holiday season.
An Admin on the official forums did post an update:
“As stated previously, Rise of the Tomb Raider’s PlayStation 4 release is set for Holiday 2016.”
Rise of the Tomb Raider has already launched on Xbox and PC and is still on course for a PS4 release this holiday.
Source: Square Enix Forums