According to the recent list of games not backward-compatible with the PlayStation 5, Diablo III (PS4) is playable. However, the PS3 version isn't compatible as none of the PS1, PS2 and PS3 games are compatible in PS5. About 99.7% of the PS4 games are backward-compatible with the PS5 via the "Game Boost" feature which forces PS4 games to run at faster or smoother framerates.
Diablo III (PS4) Playable in PS5
Diablo III (PS4) Playable in PS5
Diablo III (PS4) Playable in PS5
According to the recent list of games not backward-compatible with the PlayStation 5, Diablo III (PS4) is playable. However, the PS3 version isn't compatible as none of the PS1, PS2 and PS3 games are compatible in PS5. About 99.7% of the PS4 games are backward-compatible with the PS5 via the "Game Boost" feature which forces PS4 games to run at faster or smoother framerates.