Morgan and Hales shared a stand of 48 before the captain fell and, after Jonny Bairstow struck two sixes in his 28, it was down to Hales to see his side home.
Kohli also admitted that losing three wickets in quick succession is a hard task for other batsman to recover, and in the decider match the batsman need to pull up their socks.
Captain Virat Kohli (43 off 29 balls) played his part with his authoritative strokeplay while Hardik Pandya, who shone with the ball earlier with a four-wicket haul, also made a significant contribution with the bat.
Pandya bowled smartly, not giving England anything to drive and changing his pace often in his personal best analysis of 4 for 38, reducing a marauding England batting to 198 when they had looked good for 225. Yadav has managed to pick four wickets in two outings in the series so far but has leaked runs.
Overall, India was a better side with its batsmen in better control of the situation and Rohit's knock was an add-on for the visitors.
India's Rohit Sharma, left, shakes hands with England's Jason Roy at the end of the 3rd IT20 Series cricket match between England and India, at the Brightside Ground, in Bristol, England, Sunday July 8, 2018. The partnership became hard for India. Roy notched up a half-century. Even after losing wickets, England continued to maintain a good scoreboard. Having contributed just 32 (30 balls) in their partnership of 123, must have been a odd position to be in for Rohit.
Siddarth Kaul came to bowl the last over of the innings, Plunkett lost his wicket in an attempt to cut the ball for a shot. Dhoni completed the catch this time around.
MS Dhoni took the fifth catch of the match, the first wicket-keeper to achieve the feat. Shikhar Dhawan once again missed out but Rohit was not going to let this go. He slammed three more after reaching the landmark as England piled on 73 runs in the powerplay, their second highest ever in the format.
1 - MS Dhoni became the first wicketkeeper to take 150 T20 catches.
Alex Hales and David Willey combined to seal a five-wicket win in Cardiff. He found able support in the form of the skipper after KL Rahul's dismissal to a spectacular catch by Chris Jordan. Indian captain Virat Kohli replaced Rahul. The duo constructed a crucial partnership.
Jordan gave England a ray of hope when things looked dim for the hosts by picking up Kohli's wicket with a sharp catch off his own bowling. In reply, India made 201/3 in 18.4 overs. The run rate was 10.02 per over. Only Pakistan (9) have won more on the trot. Pandya had a formality to do and he did well with a six to take India to victory, that too, in style.