v3.22.2

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2022	Aug. 15, 2022
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001838361
Entity File Number	001-40273
Entity Registrant Name	SUPERNOVA PARTNERS ACQUISITION COMPANY III, LTD.
Entity Incorporation, State or Country Code	E9
Entity Tax Identification Number	98-1574762
Entity Address, Address Line One	4301 50th Street NW
Entity Address, Address Line Two	Suite 300 PMB 1044
Entity Address, City or Town	Washington
Entity Address, State or Province	DC
Entity Address, Postal Zip Code	20016
City Area Code	202
Local Phone Number	918-7050
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
Entity Ex Transition Period	false
Entity Shell Company	true
Units
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-fifth of one redeemable warrant to purchaseone Class A ordinary share
Trading Symbol	STRE.U
Security Exchange Name	NYSE
Class A Common Stock
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	STRE
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		28,103,449
Warrants
Document Information [Line Items]
Title of 12(b) Security	Warrants, each whole exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol	STRE WS
Security Exchange Name	NYSE
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,025,862

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Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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Supernova Partners Acquisition Co III, Ltd. 10-Q