Cover - shares	9 Months Ended
	Mar. 31, 2022	May 05, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2022
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--06-30
Entity File Number	000-56326
Entity Registrant Name	AG ACQUISITION GROUP III, INC.
Entity Central Index Key	0001874999
Entity Tax Identification Number	87-1779429
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	625 N. Flagler Drive
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	West Palm Beach
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33401
City Area Code	(800)
Local Phone Number	341-2684
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Elected Not To Use the Extended Transition Period	false
Entity Shell Company	true
Entity Common Stock, Shares Outstanding		10,000,000