Square Enix has yet to officially announce a Switch version of Seiken Densetsu 3.
Seiken Densetsu 3 originally launched for Super Famicom in Japan on September 30, 1995.
Earlier today, Square Enix posted a short video of two developers playing Secret of Mana 2/Seiken Densetsu 3 on a Switch to the official Twitter account for the franchise. Is it for the Virtual Console or something apart?
Something else here is unusual, as you can see in the filming that accompanies this note, the game looks pretty good, but the curious thing is the background that is seen behind.
Virtual Console is still a pipe dream for the Nintendo Switch, but classic games have been appearing on the console with or without Nintendo's help.
However, Square Enix is also in the middle of celebrating the 25th anniversary of the Mana series (it began in 1991 with the release of Final Fantasy Adventure), so now would be a fine time to re-release the game for modern audiences.