Yes! Finally as been announced by Nintendo, on her last Nintendo Direct (November 13th).
A lot of people as been waiting for Miiverse come to 3DS between this year, when some months ago Nintendo have confirmed Miiverse for PC and Smartphone (using Nintendo ID of WiiU users). For the users without WiiU (like me) this is gona be great.
Miiverse for Nintendo 3DS family comes on the next month of December with a actualization for 3DS.
It's not even going to be that good. There won't be any user messaging and friend request. Sorry, but I got to be a pessimist this time. However, on the bright side, there will be communities to join, and that I look forward to doing!