On Monday, the England and Wales Cricket Board (ECB) announced that Trott has returned to England and will take a break from cricket.
"Jonathan Trott has returned from England's current tour of Australia with a stress related illness. The England batsman will take a break from cricket for the foreseeable future and will take no further part in the tour. Trott's return to cricket will determined in due course," a report on ECB's website said.
England lost to Australia by 381 runs in the first Ashes Test that concluded on Sunday (November 24). Trott scored 10 and 9 in the Test.
Trott said: "I don't feel it is right that I'm playing knowing that I'm not 100% and I cannot currently operate at the level I have done in the past. My priority now is to take a break from cricket so that I can focus on my recovery. I want to wish my team mates all the very best for the remainder of the tour."
The 32-year-old Trott has played 49 Tests and 68 One Day Internationals.
In the past, England's Marcus Trescothick and Michael Yardy too have left cricket tours midway due to stress-related illness.
Hugh Morris, Managing Director England Cricket, said: "Jonathan Trott is an incredibly talented cricketer who has proven himself time and again for England. The cricket side of things is unimportant now, all that matters is that Jonathan is given the time, support and space he needs to recover. We fully support his decision to leave the tour and the ECB will provide all the assistance we can to help Jonathan and his family through this period. Jonathan has asked for privacy while he recovers and I would urge everyone to respect that."
The second Test starts in Adelaide on December 5.