Hasil Latihan Bebas 3 Moto3 San Marino Italia 2018, Misano Adriatico, Jumat, 7 September 2018
| Pos. | Num. | Pembalap | Negara | Tim | Motor | Km/h | Waktu | Gap 1st/Prev. |
| 1 | 84 | Jakub KORNFEIL | CZE | Redox PruestelGP | KTM | 206.6 | 1’43.526 | |
| 2 | 65 | Philipp OETTL | GER | Sudmetal Schedl GP Racing | KTM | 205.7 | 1’43.774 | 0.248 / 0.248 |
| 3 | 44 | Aron CANET | SPA | Estrella Galicia 0,0 | Honda | 199.3 | 1’43.896 | 0.370 / 0.122 |
| 4 | 12 | Marco BEZZECCHI | ITA | Redox PruestelGP | KTM | 204.4 | 1’44.016 | 0.490 / 0.120 |
| 5 | 19 | Gabriel RODRIGO | ARG | RBA BOE Skull Rider | KTM | 204.1 | 1’44.040 | 0.514 / 0.024 |
| 6 | 75 | Albert ARENAS | SPA | Angel Nieto Team Moto3 | KTM | 206.1 | 1’44.191 | 0.665 / 0.151 |
| 7 | 14 | Tony ARBOLINO | ITA | Marinelli Snipers Team | Honda | 206 | 1’44.303 | 0.777 / 0.112 |
| 8 | 88 | Jorge MARTIN | SPA | Del Conca Gresini Moto3 | Honda | 202.8 | 1’44.393 | 0.867 / 0.090 |
| 9 | 48 | Lorenzo DALLA PORTA | ITA | Leopard Racing | Honda | 206.5 | 1’44.437 | 0.911 / 0.044 |
| 10 | 5 | Jaume MASIA | SPA | Bester Capital Dubai | KTM | 203.8 | 1’44.523 | 0.997 / 0.086 |
| 11 | 22 | Kazuki MASAKI | JPN | RBA BOE Skull Rider | KTM | 204.9 | 1’44.695 | 1.169 / 0.172 |
| 12 | 21 | Fabio DI GIANNANTONIO | ITA | Del Conca Gresini Moto3 | Honda | 203.5 | 1’44.764 | 1.238 / 0.069 |
| 13 | 42 | Marcos RAMIREZ | SPA | Bester Capital Dubai | KTM | 205.7 | 1’44.812 | 1.286 / 0.048 |
| 14 | 17 | John MCPHEE | GBR | CIP – Green Power | KTM | 206.2 | 1’44.814 | 1.288 / 0.002 |
| 15 | 3 | Kevin ZANNONI | ITA | TM Racing Factory 3570 MTA | TM RACING | 200.5 | 1’44.818 | 1.292 / 0.004 |
| 16 | 72 | Alonso LOPEZ | SPA | Estrella Galicia 0,0 | Honda | 201.4 | 1’44.940 | 1.414 / 0.122 |
| 17 | 8 | Nicolo BULEGA | ITA | SKY Racing Team VR46 | KTM | 203.8 | 1’44.968 | 1.442 / 0.028 |
| 18 | 77 | Vicente PEREZ | SPA | Reale Avintia Academy 77 | KTM | 206 | 1’45.023 | 1.497 / 0.055 |
| 19 | 33 | Enea BASTIANINI | ITA | Leopard Racing | Honda | 203.1 | 1’45.036 | 1.510 / 0.013 |
| 20 | 24 | Tatsuki SUZUKI | JPN | SIC58 Squadra Corse | Honda | 203.6 | 1’45.067 | 1.541 / 0.031 |
| 21 | 23 | Niccolò ANTONELLI | ITA | SIC58 Squadra Corse | Honda | 203.3 | 1’45.124 | 1.598 / 0.057 |
| 22 | 10 | Dennis FOGGIA | ITA | SKY Racing Team VR46 | KTM | 205.3 | 1’45.165 | 1.639 / 0.041 |
| 23 | 16 | Andrea MIGNO | ITA | Angel Nieto Team Moto3 | KTM | 202.5 | 1’45.242 | 1.716 / 0.077 |
| 24 | 71 | Ayumu SASAKI | JPN | Petronas Sprinta Racing | Honda | 204.1 | 1’45.246 | 1.720 / 0.004 |
| 25 | 27 | Kaito TOBA | JPN | Honda Team Asia | Honda | 204.8 | 1’45.446 | 1.920 / 0.200 |
| 26 | 40 | Darryn BINDER | RSA | Red Bull KTM Ajo | KTM | 203.3 | 1’45.652 | 2.126 / 0.206 |
| 27 | 41 | Nakarin ATIRATPHUVAPAT | THA | Honda Team Asia | Honda | 201.2 | 1’45.768 | 2.242 / 0.116 |
| 28 | 81 | Stefano NEPA | ITA | CIP – Green Power | KTM | 206.1 | 1’45.901 | 2.375 / 0.133 |
| 29 | 7 | Adam NORRODIN | MAL | Petronas Sprinta Racing | Honda | 203.1 | 1’46.264 | 2.738 / 0.363 |
| 30 | 55 | Yari MONTELLA | ITA | SIC58 Squadra Corse | Honda | 198.5 | 1’47.697 | 4.171 / 1.433 |