Originally due for release today (14th November), it seems that Pinball FX 3 has been delayed.
Nintendo Life published an article just a couple of weeks ago, with more details on Pinball FX 3, along with the planned release date of 14th November.
A recent article at Destructoid confirms that the game has been pushed back to December, although no reason is given. As they say, it's better to delay the game for a bit in the event of issues, instead of rushing it out.
While we often have more games with confirmed release dates for the next couple of weeks than beyond that, December is currently looking quite sparse, so it's not so bad to hold a few games back until then if need be.