According to the official website, Katekyo Hitman Reborn!
anime was announced to end on September 25th by the episode 203 "Atarashii Mirai e (Toward the new future)". The TV anime has animated up to Mirai-hen (Future arc) of the original manga. It's unknown that the ongoing Keishoshiki-hen will be animated.
Source: Katekyo Hitman Reborn official website