English cricketers are wary of security concerns in Bangladesh, which was recently hit by terror attacks last month by ISIS militants
Former England off-spinner Robert Croft will coach the England one-day squad in their five-match series against South Africa.
The 34-year-old Welshman's contract with county side Glamorgan expires at the end of the current season, but he intends to make himself available to play Twenty20 cricket.
Nathan McCullum is currently playing for New Zealand in the Champions Trophy -- and was included in the Black Caps side due to play England in a Group A match at Welsh county Glamorgan's Cardiff headquarters on Sunday.
Former England spinner Robert Croft confirmed on Thursday that he plans to retire at the end of this season.