v3.26.1
Cover
Jun. 03, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 03, 2026
Entity File Number 001-40677
Entity Registrant Name PLUM ACQUISITION CORP. III
Entity Central Index Key 0001845550
Entity Tax Identification Number 98-1581691
Entity Incorporation, State or Country Code A1
Entity Address, Address Line One 2600 - 1066 West Hastings Street
Entity Address, City or Town Vancouver
Entity Address, State or Province BC
Entity Address, Postal Zip Code V6E 3X1
City Area Code 929
Local Phone Number 529-7125
Written Communications true
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
Class A ordinary shares included as part of the Units, par value $0.0001 per share  
Title of 12(b) Security Class A ordinary shares included as part of the Units, par value $0.0001 per share
Trading Symbol PLMJF
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50  
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol PLMWF
Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant to acquire one Class A ordinary share  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant to acquire one Class A ordinary share
Trading Symbol PLMUF