No, but fortunately, you don't have to actually be in a country in order to set your regional settings to pretend you're in it. I will stop at the Toronto airport for a couple of hours in late June, but my visa does not allow me to leave the airport.
Anyway, I have to set my region to Canada in order to download games because the eShop for Argentina doesn't have any games worth downloading.
But no, that still didn't work. Does anyone know how to let my 3DS 'know' there's a new update?