Cal Crutchlow memimpin latihan bebas ketiga MotoGP Aragon 2018, sedangkan Valentino Rossi dan rekan setimnya di Yamaha Maverick Vinales harus mengikuti Q1 setelah mengalami kecelakaan.
Berikut hasil lengkap FP3 MotoGP Aragon 2018:
| POS | RIDER | TEAM | BIKE | TIME | GAP | LAPS |
|---|---|---|---|---|---|---|
| 1 | Cal Crutchlow | LCR Honda | Honda | 1m47.393s | – | 17 |
| 2 | Jack Miller | Pramac Ducati | Ducati | 1m47.413s | 0.020s | 19 |
| 3 | Andrea Dovizioso | Ducati | Ducati | 1m47.575s | 0.182s | 17 |
| 4 | Andrea Iannone | Suzuki | Suzuki | 1m47.604s | 0.211s | 19 |
| 5 | Marc Marquez | Honda | Honda | 1m47.606s | 0.213s | 19 |
| 6 | Dani Pedrosa | Honda | Honda | 1m47.629s | 0.236s | 18 |
| 7 | Danilo Petrucci | Pramac Ducati | Ducati | 1m47.746s | 0.353s | 18 |
| 8 | Alvaro Bautista | Aspar Ducati | Ducati | 1m47.891s | 0.498s | 20 |
| 9 | Alex Rins | Suzuki | Suzuki | 1m48.051s | 0.658s | 19 |
| 10 | Jorge Lorenzo | Ducati | Ducati | 1m48.057s | 0.664s | 15 |
| 11 | Maverick Vinales | Yamaha | Yamaha | 1m48.087s | 0.694s | 19 |
| 12 | Bradley Smith | KTM | KTM | 1m48.096s | 0.703s | 18 |
| 13 | Franco Morbidelli | MVDS Honda | Honda | 1m48.129s | 0.736s | 16 |
| 14 | Johann Zarco | Tech3 Yamaha | Yamaha | 1m48.154s | 0.761s | 17 |
| 15 | Aleix Espargaro | Aprilia | Aprilia | 1m48.397s | 1.004s | 18 |
| 16 | Karel Abraham | Aspar Ducati | Ducati | 1m48.423s | 1.030s | 17 |
| 17 | Takaaki Nakagami | LCR Honda | Honda | 1m48.450s | 1.057s | 20 |
| 18 | Valentino Rossi | Yamaha | Yamaha | 1m48.905s | 1.512s | 18 |
| 19 | Thomas Luthi | MVDS Honda | Honda | 1m49.259s | 1.866s | 17 |
| 20 | Hafizh Syahrin | Tech3 Yamaha | Yamaha | 1m49.361s | 1.968s | 15 |
| 21 | Scott Redding | Aprilia | Aprilia | 1m49.421s | 2.028s | 18 |
| 22 | Xavier Simeon | Avintia Ducati | Ducati | 1m49.564s | 2.171s | 19 |
| 23 | Pol Espargaro | KTM | KTM | 1m49.701s | 2.308s | 6 |
| 24 | Jordi Torres | Avintia Ducati | Ducati | 1m51.171s | 3.778s | 17 |
