Sugotoku Contents site had confirmed that the Final Airing of Kamen Rider Saber will be on August 22. So a total of 47 episodes?
By the way, I saw somewhere on 5ch that on August 15 there will be no broadcast. So could also be 46 episodes. But this is yet to be confirmed.
Episode 44 Summary: "Wonder World started eating up the real world once again. Something happens to Yuri (Kamen Rider Saikou). Meanwhile, Touma Kamiyama (Kamen Rider Saber) takes an oath with his friends to protect the world".
I am not sure if Yuri is going to die in this episode. But he foreshadowed something in Episode 42 by saying "So you are gone, Victor. I will come there afterward".
(Credits to @tokutokuan for the sharing the Summary Scan)