Question
FOR 10 YRS NO TROUBLE WITH BOUGAINVILLEAS NOW THE LEAVES START WITH CREAN COLORED IRREGULAR SPOTS  THEN THEY FALL AS THE CREAM SPOTS GET LARGER  ON THE GROUND THEY ARE CREAM COLORED COMPLETLY

Answer
Hi Bill,  You do not say where you are from, is it possible that it is getting too much water, maybe from rain?  Also, it could be Magnesium deficiency:  First appears on older leaves where they turn a spotted yellow or tan color.  Bougainvillea do love water but need good drainage.  kathy