Frank Nsubuga plays for Uganda and the bowler has completed 18 maidens in 75 matches so far.
India's medium pacer Praveen Kumar bowled 19 maidens in 177 T20s.
Bumrah has bowled a total of 19 maidens in 210 T20s. The number is surely going to increase.
Mohammad Irfan of Pakistan has bowled 20 maidens in 153 matches in T20 cricket.
Pakistan's Mohammad Amir has bowled a total of 20 maiden overs in 250 T20 matches.
Wahab Riaz of Pakistan has bowled 21 maiden overs in his 348-match career.
Samuel Badree bowled 21 maidens in 197 T20s in his career.
Bhuvneshwar Kumar of India has played in 263 T20s so far, bowling 22 maiden overs.
Bangladesh captain Shakib Al Hasan has bowled 25 maiden overs in T20s.
Sunil Narine has bowled 28 maiden overs in T20 cricket in 473 matches played so far.