DICE general manager, “Karl-Magnus Troedsson” has cleared that Battlefield 4 will not support mods at E3, also they has no such plans at all to support them.
Karl-Magnus Troedsson Said:
“We get that question a lot. I always answer the same thing, and then the community calls me bad names. We get the feedback, we understand it. We also would like to see more player-created content, but we would never do something like this if we feel we couldn’t do this 100 percent. That means we need to have the right tools available, we need to have the right security around this regarding what parts of the engine we let loose, so to say. So for BF4 we don’t have any planned mod support, I have to be blunt about saying that. We don’t.
But it is something that we are thinking about for the future, where we are going with the product, et cetera. So user-created content is something that’s very interesting to us, but I’m sorry to say that we will not have mod support in BF4.”