The last chapter of Chainsaw Man Part 2 was released today. There does not seem to be any information about whether a part 3 will be released, and my impression of the Part 2's final chapter is that it leaves the possibility open, but also definitely could just be the end of the series. Notably, it ended with just a small "The End!" at the bottom, while Part 1 ended with a "End of Part 1: Public Safety Arc," setting up that there would be a future part much more clearly.