| Date: | Thursday, 18 September 2008 |
| Session: | Day 3 (of 4) |
| Track: | Jerez |
| Track length: | 4.429 km |
| Weather: | Sunny then overcast in the morning, rain in the afternoon (17-25°C, Track: 20-31°C) |
| News article: | Jerez: Vettel on top as rain arrives on day 3 Jerez: Day 3 team test notes |
| P | Driver | Constructor | Car | T | Time | Gap | Avg Speed | Laps |
| 1 | Sebastian Vettel | Red Bull-Renault | RB4 | B | 1:18.001 | 204.413 | 37 | |
| 2 | Nick Heidfeld | BMW Sauber-BMW | F1.08 | B | 1:18.167 | 0.166 | 203.979 | 70 |
| 3 | Lucas Di Grassi | Renault | R28 | B | 1:18.999 | 0.998 | 201.830 | 36 |
| 4 | Pedro de la Rosa | McLaren-Mercedes | MP4-23 | B | 1:19.281 | 1.280 | 201.112 | 39 |
| 5 | Alexander Wurz | Honda | RA108 | B | 1:19.499 | 1.498 | 200.561 | 79 |
| 6 | Takuma Sato | Toro Rosso-Ferrari | STR3 | B | 1:19.574 | 1.573 | 200.372 | 49 |
| 7 | Kamui Kobayashi | Toyota | TF108 | B | 1:19.863 | 1.862 | 199.647 | 47 |
| 8 | Kazuki Nakajima | Williams-Toyota | FW30B | B | 1:21.892 | 3.891 | 194.700 | 60 |