Netflix has recently confirmed that the Castlevania animated series has been renewed for a fourth season. For those who are not aware, the third season of the series debuted on the service earlier this month and consisted of 10 episodes. Currently no other details about the fourth season has been revealed at this time, however going by previous production schedules expect this season to debut late this year or sometime in 2021.
— NX (@NXOnNetflix) March 27, 2020
While I did enjoy the third season of the series the plot progression in my opinion was a bit of a mess, however I do appreciate that the team went pretty experimental with it. Some of the story elements didn’t really seem to connect all that well so hopefully it will be addressed in the fourth season of the series.