The Japanese photographer Kimio Tanaka, who had Ricoh/Pentax insider information in the past and a good track record of reporting relevant information, recently posted on Twitter/X that Pentax is preparing to announce a new “serious and interesting” DSLR camera to replace the recently discontinued K-3 III:
For PENTAX, the end of production was unfortunate, and they are probably already planning a “next” SLR camera to replace the K-3 III. Unless their boss RICOH suddenly changes its mind, it will be a “serious and interesting” SLR camera to be announced in the not-too-distant future. I look forward to seeing what kind of camera it will be. Although I said that the “PENTAX K-3 III” has finally been discontinued, it is not because of poor sales. I think there must have been some “unavoidable circumstances” that led to the end of production. Since I have had a long and long relationship with PENTAX, I can easily imagine the reasons. This has happened from time to time in the past.
Pentax K-3 Mark III marked as discontinued on the official website