Two years after the release of Alex Rider season 2, the series is returning to Amazon Freevee with its final batch of episodes. All eight installments drop on April 5 and will focus even more heavily on the criminal network known as Scorpia. Executive producer, Eve Gutierrez, reveals that the writers had a clear idea of how Alex would evolve throughout the show, and the creative team views season 3 as the final chapter of the current iteration. Given the success of Anthony Horowitz's books, there's always a chance for the adventure to, someday, be revisited in a different capacity.
https://screenrant.com/alex-rider-season-3-eve-gutierrez-sofia-helin-interview/