Broad, meanwhile, apologised for failing to follow on-field etiquette when not appealing for Abdur Razzak's wicket.
"Elbow extension in Razzak's bowling action exceeded the 15 degree level of tolerance, " read an ICC statement.
Bosman smashed a huge six over square-leg but succumbed to spinner Andul Razzak's second ball, top-edging to mid-off.
The hosts' usual ODI nemesis, Abdur Razzak, for example, was able to take only one wicket in three games.
Razzak struck with the first ball of the resumption and finished with superb figures of 4-16 from three overs.
After 14 overs the first bowling change brought success, as left-arm spinner Abdur Razzak snared the prize wicket of Tendulkar.
But left-arm spinner Abdur Razzak took 4-39 as the Windies were skittled for 194 with more than six overs to spare.
Porterfield had laboured somewhat for his 23, and pushed a catch back to Abdur Razzak, then Mortaza returned to remove Gary Wilson.
It is the second time Razzak's action have been queried, with his bowling also being reported during a one-day match in the 2004 Asia Cup in Colombo.
An excellent slower ball deceived Naeem Islam and hit the middle stump, and three balls later he hit the middle pole again when Razzak walked across his stumps.
Kallis also scored his 49 at a run-a-ball before being cleaned up by Abdur Razzak, while de Villiers and Morkel produced some late fireworks, hitting seven sixes and five fours between them.
Junaid Siddique started aggressively, but became tied down and was leg before to Botha for 47 off 80 balls, to leave the visitors 140-5 and only a plucky ninth-wicket partnership between Mortaza and Abdur Razzak gave the score any respectability.
Shafiul Islam was well scooped low at first slip by Andrew Strauss as Finn finished with 15 wickets at an average of 17 in the series, leaving Abdur Razzak to go out in a blaze of glory by swiping at everything.
At that stage, another 113 were still needed to avoid the follow-on but Ian Bell played with positive intent and Trott, aided by some loose deliveries from Abdur Razzak, hit three fours in an over en route to a determined second Test half century.
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