Rameshbabu Praggnanandhaa is still third on 9.5 points in the Norway Chess tournament.
Vidit Gujrathi also put an end to his losses by settling for a draw with Caruana.
Gukesh faced the in-vogue Italian opening as black against Caruana and the players battled it out in the main variation.
The Indian challenge in the women's section might already have ended as Zhongyi stood firmly ahead on five points while Goryachkina had 4.5 points in her kitty.
Harika had carried the Indian hopes nicely till the tie-breaker of the third round. However, she got a jolt in the first game of the rapid tie-break where both players had 25 minutes on their clock.
The 17-year-old Gukesh is in joint lead with Russia's Ian Nepomniachtchi.
Pragg, Gujrathi out of contention
D Gukesh played out a creditable draw against top seed Fabiano Caruana but slipped a rung to the joint second position.
Gukesh tried his hands at the Ruy Lopez as white but did not get much against Praggnanandhaa. Both the teenagers have been showing great skills here against the world's best and there was nothing to choose between them when pieces flew off the board in tandem. The game was drawn in 41 moves.
Sankalp Gupta becomes India's 71st GM.
Another game to end through repetition of moves was between Gukesh and Gujrathi.
India's D Gukesh bounced back with a finely crafted game to outwit compatriot Vidit Gujrathi and regain his joint lead with Ian Nepomniachtchi of Russia after the eighth round in the Candidates chess tournament in Toronto on Friday.
Grandmaster R Praggnanandhaa produced a spectacular game to get the better of fellow-Indian Vidit Gujrathi in the third round of the Candidates Chess tournament in Toronto on Saturday.
Back in chess just before the Olympiad after a nearly two-year hiatus, Humpy, who has been among the top women players for a long time, will now have to wait for another two years to have a go at the next world championship cycle.