The NES game Castlevania 3: Dracula’s Curse or Castlevania 3 is a sequel to the series of games, specifically its second part Castlevania 2: Simon's Quest.
The third part of the game - Castlevania 2: Simon's Quest returns the player to the plot of the first part, only now the plot is not linear and the player's choice decides what the end of the game will be. After the complete passing of the game it starts all over again, but with increased difficulty. Various new items have been added to the game, which include weapons, spell items, and others.
The main difference in the gameplay of Part 3 from previous parts is the ability to play other characters that the protagonist can take with them and switch between them during the game. You can only take one partner with you. Overall, Castlevania 3 is a worthy sequel to the second installment and that's where the series ends.