Question: is obito uchiha related to sasuke uchiha?
Answer: No the three are only related because they are all from Uchiha clan, another that might link Madara & Sasuke is that they are both reincarnation of Indra. ... Sasuke is the son of Fugaku and Mikoto. The three(Madara, Obito and Sasuke) are not related to each other.