The error "Hitman 3 Executable Not Found Direct3D 12" typically occurs when the game's launcher cannot locate the primary executable file required for DirectX 12 (DX12) mode, or when the system environment lacks necessary DX12 components Common Causes & Fixes
Hitman 3 relies on Microsoft’s DirectX 12 Agility SDK to enable "High Quality" features. Many Windows installations are missing this. Hitman 3 Executable Not Found Direct3d 12 High Quality