Here is a list of batters with worst strike rate in a T20 World Cup innings (minimum 10 runs scored).
Yuvraj scored 11 runs from 21 balls at a strike rate of 52.38 against Sri Lanka in T20 World Cup 2014 final. India lost the game by 6 wickets.
Ravichandran Ashwin scored 10 runs from 20 balls at a strike rate of 50 against New Zealand in T20 World Cup 2016. India got all out for 79 and lost by 47 runs.
Ireland's Gary Wilson scored just 17 runs from 34 deliveries at a strike rate of 50 against West Indies in 2010 edition. Ireland got all out for 68.
Dhoni scored 11 runs from 23 runs at a strike rate of 47.82 against West Indies in 2009 edition. India lost the game by 7 wickets.
Pakistan's Shoaib Malik scored 12 runs from 26 deliveries at a strike rate of 46.15 against South Africa in 2012 edition. Pakistan still managed to win the match by 2 wickets.
West Indies opener scored just 16 runs from 35 balls at a strike rate of 45.71 against South Africa in the previous edition.
Scotland's lower order batter scored 14 runs from 31 balls at a strike rate of 45.16 against Pakistan in the inaugural edition of T20 World Cup.
Former Afghanistan batter scored 10 runs from 23 balls at a strike rate of 43.47 against Bangladesh in 2014 edition. Afghanistan got all out for 72.
Bangladesh all-rounder scored 14 runs from 35 balls at a strike rate of 40 against South Africa in the maiden T20 World Cup.
West Indies opener scored 11 runs from 29 balls at a strike rate of 37.93 against India in 2014 edition.