https://www.polygon.com/2018/2/28/17062548/playstation-plus-ps3-vita-games-2019

Time is running out for PlayStation 3 and PlayStation Vita owners when it comes to the monthly PlayStation Plus slate — Sony will no longer include PS3 or Vita games in the lineup starting in March 2019, the company announced today.

February 2019 will be the final month to follow the six-game format that has been in place since the PlayStation 4 launched in November 2013: two games on each of the three platforms. Starting with the March list, which will go live March 8, 2019, Sony will only include PS4 games.