The incident took place in the third over of the Nepal chase on Sunday when Tanzim, after bowling a delivery, walked towards Paudel "in an aggressive manner and made inappropriate physical contact."
Tanzim bowled exceptionally well in the game and finished with a match-winning spell of 4/7 to help Bangladesh claim a 21-run win at the Arnos Vale Ground in Kingstown.
In addition to the fine, "one demerit point has been added to Tanzim's disciplinary record, for whom it was the first offence in a 24-month period."
The 21-year-old was found to have breached Article 2.12 of the ICC Code of Conduct for Players and Player Support Personnel, which relates to "inappropriate physical contact with a Player, Player Support Personnel, Umpire, Match Referee or any other person (including a spectator during an International Match".
The charges were levelled by on-field umpires Ahsan Raza and Sam Nogajski, along with third umpire Jayaraman Madanagopal and fourth umpire Kumar Dharmasena.