Jenni Lada for Siliconera:

It began with a screenshot showing Jill in the Resident Evil remake. It asked, “Ever feel like somebody’s watching you…?” This is a reference to Resident Evil 3: Nemesis, which has Jill stalked by Nemesis, who she frequently encounters throughout the game.

The second tease appeared on April 16, 2019. It shows one of the walls in the Resident Evil 2 January 2019 release that has been smashed. Since Resident Evil 2 takes place just after Jill dealt with Raccoon City’s horrors in Resident Evil 3: Nemesis, Claire and Leon are witnessing the aftermath of her encounters with Nemesis.

While I’d love to be wrong, I think it’s a massive leap to assume these vague, unrelated posts have anything to do with the announcement of a Resident Evil 3 game. Given the success of the Resident Evil 2 remake, I’m certain we’ll see one eventually but I doubt this is it.