Danilo Petrucci kembali memuncaki sesi latihan bebas MotoGP Valencia, sedangkan Valentino Rossi mengalami kecelakaan.
Berikut hasil lengkap FP3 MotoGP Valencia 2018:
| Pos | Rider | Team | Bike | Time | Gap | Laps |
|---|---|---|---|---|---|---|
| 1 | Danilo Petrucci | Pramac Ducati | Ducati | 1m39.712s | – | 20 |
| 2 | Andrea Dovizioso | Ducati | Ducati | 1m39.800s | 0.088s | 19 |
| 3 | Marc Marquez | Honda | Honda | 1m39.826s | 0.114s | 21 |
| 4 | Jack Miller | Pramac Ducati | Ducati | 1m39.912s | 0.200s | 15 |
| 5 | Johann Zarco | Tech3 Yamaha | Yamaha | 1m40.141s | 0.429s | 19 |
| 6 | Dani Pedrosa | Honda | Honda | 1m40.185s | 0.473s | 24 |
| 7 | Pol Espargaro | KTM | KTM | 1m40.275s | 0.563s | 21 |
| 8 | Alex Rins | Suzuki | Suzuki | 1m40.417s | 0.705s | 19 |
| 9 | Aleix Espargaro | Aprilia | Aprilia | 1m40.530s | 0.818s | 11 |
| 10 | Michele Pirro | Ducati | Ducati | 1m40.586s | 0.874s | 11 |
| 11 | Maverick Vinales | Yamaha | Yamaha | 1m40.647s | 0.935s | 22 |
| 12 | Franco Morbidelli | MVDS Honda | Honda | 1m40.675s | 0.963s | 21 |
| 13 | Valentino Rossi | Yamaha | Yamaha | 1m40.750s | 1.038s | 19 |
| 14 | Stefan Bradl | LCR Honda | Honda | 1m40.806s | 1.094s | 22 |
| 15 | Andrea Iannone | Suzuki | Suzuki | 1m40.871s | 1.159s | 14 |
| 16 | Alvaro Bautista | Aspar Ducati | Ducati | 1m40.900s | 1.188s | 20 |
| 17 | Jorge Lorenzo | Ducati | Ducati | 1m41.026s | 1.314s | 17 |
| 18 | Scott Redding | Aprilia | Aprilia | 1m41.357s | 1.645s | 17 |
| 19 | Bradley Smith | KTM | KTM | 1m41.362s | 1.650s | 22 |
| 20 | Karel Abraham | Aspar Ducati | Ducati | 1m41.813s | 2.101s | 19 |
| 21 | Hafizh Syahrin | Tech3 Yamaha | Yamaha | 1m41.832s | 2.120s | 19 |
| 22 | Takaaki Nakagami | LCR Honda | Honda | 1m41.992s | 2.280s | 23 |
| 23 | Thomas Luthi | MVDS Honda | Honda | 1m42.040s | 2.328s | 19 |
| 24 | Jordi Torres | Avintia Ducati | Ducati | 1m43.439s | 3.727s | 19 |
