It's kind of sad how Artyom just seems to forget about his adopted dad
Like does he ever mention him in Last Light and Exodus? The guy raised him since he was a kid and he's rarely ever referred to in the diary entries and other things. Artyom has a lot to say on the factions and the Dark Ones and whatever but not his home and dad.
Exodus' emotional climax has Miller symbolically adopting Artyom and I just remembered poor Sukhoi has no idea what happened to his son and daughter-in-law. Hansa either completely hid their fates or marked them as traitors to the Metro.
Hopefully we see him again in 2039.