| Cover | May 05, 2022 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 5, 2022 |
| Entity File Number | 001-41011 |
| Entity Registrant Name | Lionheart III Corp |
| Entity Central Index Key | 0001845991 |
| Entity Tax Identification Number | 36-4981022 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 4218 NE 2nd Avenue |
| Entity Address, City or Town | Miami |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33137 |
| City Area Code | 305 |
| Local Phone Number | 573-3900 |
| 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 share of Class A common stock, $0.0001 par value, and one-half of one redeemable warrant | |
| Title of 12(b) Security | Units, each consisting of one share of Class A common stock, $0.0001 par value, and one-half of one redeemable warrant |
| Trading Symbol | LIONU |
| Security Exchange Name | NASDAQ |
| Shares of Class A common stock included as part of the units | |
| Title of 12(b) Security | Shares of Class A common stock included as part of the units |
| Trading Symbol | LION |
| Security Exchange Name | NASDAQ |
| Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 | |
| Title of 12(b) Security | Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 |
| Trading Symbol | LIONW |
| Security Exchange Name | NASDAQ |
