This will finally end the speculation about online gameplay for Monster Hunter 3G. The multiplayer aspect of the game will instead be limited to local play only. Furthermore, Capcom explained that the game uses the internet to download event quests.
This is disappointing to hear, but perhaps understandable. The ability of the 3DS to run a proper online multiplayer experience may not be quite up to snuff.
Monster Hunter 3G will be released in Japan for the 3DS on December 10, 2011. The North American and European release dates are still TBA.