If you bought the game digitally on your 3DS in the past, the "Animal Crossing- New Leaf -Normal Download Link-" is still available to you. You can find it in your "Redownloadable Software" list in the Nintendo eShop history on your device. This is the only 100% legal and safe way to obtain a digital copy.
Do not fall for the fake "direct download" links on shady websites. They will not give you a vacation from Tom Nook; they will give your antivirus a nervous breakdown. Animal Crossing- New Leaf -Normal Download Link-
With the eShop closed, many turn to the internet to find a ROM of the game to play on PC emulators (like Citra) or on modified 3DS consoles. If you bought the game digitally on your