v3.26.3
Document and Entity Information
6 Months Ended
Jun. 30, 2026
Document and Entity Information  
Document Type F-4
Entity Registrant Name Black Spade Acquisition III Co
Entity Incorporation, State or Country Code E9
Entity Tax Identification Number 00-0000000
Entity Address, Address Line One Suite 2902, 29/F, The Centrium
Entity Address, Adress Line Two 60 Wyndham Street
Entity Address, City or Town Central
Entity Address, Country HK
City Area Code 852
Local Phone Number 3955 1316
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0002087087
Amendment Flag false