| Cover | Aug. 23, 2022 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 23, 2022 |
| Entity File Number | 001-40078 |
| Entity Registrant Name | Kismet Acquisition Three Corp. |
| Entity Central Index Key | 0001826059 |
| Entity Tax Identification Number | 00-0000000 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 850 Library Avenue |
| Entity Address, Address Line Two | Suite 204 |
| Entity Address, City or Town | Newark |
| Entity Address, State or Province | DE |
| Entity Address, Postal Zip Code | 19715 |
| City Area Code | 302 |
| Local Phone Number | 738-6680 |
| Written Communications | false |
| 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 |
| Units, each consisting of one Class A Ordinary Share and one-third of one Warrant | |
| Title of 12(b) Security | Units, each consisting of one Class A Ordinary Share and one-third of one Warrant |
| Trading Symbol | KIIIU |
| Security Exchange Name | NASDAQ |
| Class A Ordinary Shares, par value $0.001 per share | |
| Title of 12(b) Security | Class A Ordinary Shares, par value $0.001 per share |
| Trading Symbol | KIII |
| Security Exchange Name | NASDAQ |
| Warrants, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50 | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50 |
| Trading Symbol | KIIIW |
| Security Exchange Name | NASDAQ |
