He can only use Kamui.
If he had 2 MS he could. If he takes Kakashi's MS that he gave too him, and implanted it in his eye, along with his original MS, he could achieve Susano'o. You need your own 2 MS too achieve Susano'o.
He only has one MS...you need both in order to get Susanoo
shisui didnt have it
susanoo is rare
Actually we dont know if he had it or not sooo thats just speculation. And both MS is IN FACT the requirement now whether someone with both gets susanoo is another question. Probably have to be an skilled Uchiha
Uhh.. well it was never mentioned it the manga that he could, so I guess for now we should assume that he can't .. since it seems that not everyone gets the same power, which is why Itachi or Sasuke didn't have/get Kamui.. So yeah BR0 .