Some people have speculated that Season 3 of Stranger Things may be the last season of the series, but it is apparent that it is not the previous season. There are still a lot of things that are not yet solved, and people would like to know more about it.
According to the makers of the series, it is possible that Stranger Things would last for about another season or two more. Fans of the show will probably be disappointed if the 4th season is going to be the last. Some people are also happy that it will not last very long because the story might become a bit weird already if it continues for a more extended period.
There is no confirming or denying if season 3 will be the last Season of Stranger Things. If there is also no confirming or denying if there would be a new season after Season 3. However, from season 3 of Stranger Things, there are so many unanswered questions which makes it likely that there would be a new season.
Rumour also has it that one of the Duffer brothers; Ross Duffers reveals that season 4 will be very different from previous season. This gives a hint that we should expect another season. I am excited about this!