AITA usually names five-member squad apart from one or two reserve players.
Leander Paes slipped to 101 after losing five places in the ATP doubles chart.
The All India Tennis Association (AITA) decided to appoint Rohit Rajpal as India's non-playing captain at its Annual General Meeting (AGM) in Chandigarh.
AITA secretary general Hironmoy Chatterjee said that Leander Paes has confirmed his availability for the tie in Islamabad.
While it was unclear what the cause of the charity was, MS Dhoni and Leander Paes were wearing practice jerseys with "Playing for Humanity" written on them.
Leander Paes was present at the stands in Trafford for the India vs Pakistan World Cup 2019 clash.
Leander Paes continued to defy his years on Friday, two weeks before his 46th birthday, winning his opening doubles match alongside in-form Frenchman Benoit Paire as he goes in search of fifth French Open trophy.
Boris Becker urged Leander Paes, Mahesh Bhupathi and Sania Mirza to team up to take the game forward in India.
No Indian Davis Cup squad have travelled to Pakistan since March 1964.
Leander Paes has been left out of the squad on basis of his world ranking.
Leander Paes however made an early exit, as he and Samantha Stosur lost in the mixed doubles second round.
The Indo-Mexican pair lost 5-7, 6-7(4/7) to the pair of Austin Krajicek and Artem Sitak.
Leander Paes was already miffed at his exclusion from TOP Scheme.
Leander Paes did not travel to Indonesia with the rest of the squad.
Paes, who has won eight medals at the previous editions of Asian Games, has not competed in the prestigious quadrennial event since winning the men's doubles gold with Mahesh Bhupathi and mixed doubles gold with Sania Mirza at the 2006 Doha Games.
Speaking to mid-day following a record doubles win against China, Leander Paes is effusive in his praise of ex-partner and current captain Mahesh Bhupathi, putting an end to almost two decades of bitterness
India advanced to the World Group Play-offs with a sensational 3-2 win over China.
Leander Paes was tied on 42 wins with Italian great Nicola Pietrangeli but managed to surpass him with a gritty performance on Saturday in the Davis Cup match against China.