Waqar Younis has questioned the timing of cricket authorities' crackdown against chucking just months away from the World Cup, and suggested that rules on bowling actions be relaxed for spinners.
Gayle, who had missed the final Test against Bangladesh earlier this month due to a lower-back injury, will also miss the limited-overs leg of the India tour.
Mashrafe was put in charge only for the five-match ODI series against Zimbabwe, who will arrive in late October for a tour which will also include three Tests.
Shahid Afridi said Monday the team's senior cricketers should be given dignified farewells, after veteran batsman Younis Khan was unceremoniously axed from the one-day squad.