v3.26.1
Form N-1A Cover
Oct. 31, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name INVESTMENT MANAGERS SERIES TRUST III
Entity Central Index Key 0000924727
Entity Investment Company Type N-1A
Document Period End Date Oct. 31, 2025
Prospectus Date Aug. 18, 2026