Starting in March of 2019, Sony's PlayStation Plus subscribers will no longer get monthly free games for the PlayStation 3 or the PlayStation Vita. It won't affect any games you downloaded previously, however, according to a post on the PS Blog.
The move to stop offering the free games for PS3 and PS Vita makes sense since the systems have been discontinued by Sony. While it does take away some of the value of the Plus subscription, it may mean more free games for the current gen PS4 every month. No matter what, at least they have given a year for us to get used to not having those free past gen games. #TechLogik