| Document and Entity Information | Dec. 13, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001819253 |
| Document Type | 8-K |
| Document Period End Date | Dec. 13, 2021 |
| Entity Registrant Name | Haymaker Acquisition Corp. III |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40128 |
| Entity Tax Identification Number | 85-1791125 |
| Entity Address, Address Line One | 501 Madison Avenue |
| Entity Address, Address Line Two | Floor 12 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10022 |
| City Area Code | (212) |
| Local Phone Number | 616-9600 |
| Written Communications | false |
| Soliciting Material | true |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Units Each Consisting Of One Share Of Class A Common Stock And One Fourth Of One Redeemable Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one share of Class A common stock and one-fourth of one redeemable warrant |
| Trading Symbol | HYACU |
| Security Exchange Name | NASDAQ |
| Common Class A [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A common stock, par value $0.0001 per share |
| Trading Symbol | HYAC |
| Security Exchange Name | NASDAQ |
| Warrants Each Whole Warrant Exercisable For One Share Of Class A Common Stock For 11.50 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants, each whole warrant exercisable for one share of Class A common stock for $11.50 per share |
| Trading Symbol | HYACW |
| Security Exchange Name | NASDAQ |
