The first trio of the European Tour event had been due to tee off at 7:20 a.m (0320 GMT) but dense fog meant they did not start until 10:05 a.m.
Spieth, who is playing with four-times major winner Rory McIlroy and world number six Rickie Fowler, will now begin at 2.40 p.m, while American amateur DeChambeau tees off at 3:50 p.m. Dusk is around 6 p.m.