The good news is that this change is mainly for direct payments. You can use indirect methods, such as the Nintendo Switch, to be able to add funds to the 3DS and Wii U eShops. But it is yet another sign that Nintendo has, unfortunately but unsurprisingly, decided to move on from the 3DS and Wii U.
Thursday, July 22, 2021
3DS & Wii U eShops Will No Longer Accept Direct Payments With Credit/Debit Cards Starting January 18th 2022
Nintendo has announced t that “the handling of credit cards and transportation e-money in the Nintendo eShop on the Nintendo 3DS series and Wii U will be terminated at 9:00 a.m. on January 18th, 2022. After the termination, you will no longer be able to add balances using credit cards and transportation e-money from the Nintendo 3DS series and Wii U”.