2018 FIFA World Cup qualification – CONCACAF third round
The third round of CONCACAF matches for 2018 FIFA World Cup qualification was played from 4 to 8 September 2015.
Format
A total of twelve teams played home-and-away over two legs. The six winners advanced to the fourth round.Seeding
The draw for the third round was held as part of the 2018 FIFA World Cup Preliminary Draw on 25 July 2015, starting 18:00 MSK, at the Konstantinovsky Palace in Strelna, Saint Petersburg, Russia.The seeding was based on the FIFA World Rankings of August 2014. The twelve teams were seeded into two pots:
- Pot 3 contained the teams ranked 1–6.
- Pot 4 contained the teams ranked 7–12.
Note: Bolded teams qualified for the fourth round.
| Pot 3 | Pot 4 |
Note: Guatemala were seeded into Pot 3 as they had more FIFA ranking points than Saint Vincent and the Grenadines. In the FIFA World Rankings, teams shared the same ranking if their ranking points rounded to the same whole number.