Better pictures would help, but at this point, based on the angles of the camera -- I do not think you have a dwarf foal. I know that I've had pictures of our own non-dwarf foals from those angles and seen similar results and none of them has been "dwarfy" at all... So better pics, but if I had to take a guess now, I'd say "not a dwarf". The angle of the shot with her facing the camera is one that makes the part of the horse closest to the camera seem disporportionally large. The first shot shows the head is short, not over sized... Legs do not look densely boned to me.
And, I do not mean to be "mean" but yes, if she was a dwarf, it WOULD matter to me and my breeding program if she were one of ours. But, again, I don't see a dwarf from those pictures.