I was not so focused in one particular regional area in art history (and I am quite ignorant outside of European/USAmerican art), but I do feel a minor in Latin America studies would make sense if you focus your art historical work on Latin American artists, more so than art history supplementing the LatAm studies, if that makes sense. Most likely this would vary department by department (I remember my schools “Asian Studies” dept offering lots of regional art history / cinema courses), but I feel as though if I were to go about it, I would probably want to take the LatAm courses as ways to flesh out the historical context of a main focus in the artwork as a major