v3.25.4
Cover
Mar. 10, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 10, 2026
Entity File Number 001-43071
Entity Registrant Name Archimedes Tech SPAC Partners III Co.
Entity Central Index Key 0002083910
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 2093 Philadelphia Pike #1968
Entity Address, City or Town Claymont
Entity Address, State or Province DE
Entity Address, Postal Zip Code 19703
City Area Code (725)
Local Phone Number 312-2430
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Ordinary Share, par value $0.0001 per share, and one-fourth of one redeemable Warrant  
Title of 12(b) Security Units, each consisting of one Ordinary Share, par value $0.0001 per share, and one-fourth of one redeemable Warrant
Trading Symbol ARCIU
Security Exchange Name NASDAQ
Ordinary Shares  
Title of 12(b) Security Ordinary Shares
Trading Symbol ARCI
Security Exchange Name NASDAQ
Warrants  
Title of 12(b) Security Warrants
Trading Symbol ARCIW
Security Exchange Name NASDAQ