A new 3DS physical release is coming soon, courtesy of developer Atooi--and it's called Atooi Collection. The cartridge, which will collect together various Atooi releases from the 3DS Eshop, doesn't have a release date yet, but it'll be published through Limited Run Games.
Atooi announced that the game has been approved by Nintendo, and is now just awaiting some final confirmations before it can go on sale.
Unfortunately, Atooi Collection will likely only be available in North America, as 3DS carts are region locked. Atooi confirmed this in a follow-up tweet, stating that if a region-free cart was an option, they would take it.