According to an email from Play-Asia, Nintendo has ceased production of physical game cartridges for The Legend of Zelda: Ocarina of Time 3D.
The email was supposedly in response to a customer who had purchased the title from the retailer; Play-Asia stated that they would not be able to fill the customer’s order because Nintendo had stopped the production of the game. However, there has been no confirmation from Play-Asia or Nintendo about the production halt.
While the retail version may be out of production, you can still pick up a used (or possibly still a new) copy of the game from retailers; you can also still purchase the title from the Nintendo eShop.
Here’s the alleged email: