Possible (and plausible) or not?
OTL Albania did this in 1960 over Krushchev's de-Stalinisation. Given that Romania seemed to be the most maverick of the Eastern Bloc countries when it came to toeing Moscow's line (or not doing so), could it have followed?
Of course, Albania has the advantage of being separated from the rest of the Warsaw Pact countries by neutral Yugoslavia and pro-American Greece, so Krushchev couldn't have done a Hungary in that case...