DIII

DIII can refer to:

• Division 3
• Diablo 3
• 503 in Roman numerals

Technology

• DIII-D (tokamak), a tokamak located at San Diego, California.
• Mercedes D.III

Aircraft

• Pfalz D.III
• Albatros D.III
• Fokker D.III
• Siemens-Schuckert D.III