South Africa beat West Indies by 86 runs in the second one-day international on Friday to take a 2-0 lead in the five-match series.
Fast bowler Edwards took 2-11 as South Africa, who need 389 to win, stumbled to 45-3 at lunch on the fourth day.
Shivnarine Chanderpaul became the third player to score half centuries in seven consecutive test innings as West Indies forged ahead on the second day of the first Test against South Africa on Thursday.
AB de Villiers, JP Duminy and Mark Boucher powered South Africa to a thrilling two-wicket win over New Zealand in the first one-day international on Sunday.
New Zealand, who won the toss and chose to bat, lurched to 187-8 before bad light ended play three overs after tea.
Avery declined to reveal the size of the fine but BBC reports said it was 1,000 pounds ($1,994).
India and Scotland were awarded a point each on Thursday after rain prevented any play in Durban, which left Pakistan leading the standings on two points.
Jacques Kallis suffered his second disappointment in less than a week on Thursday when he was left out of South Africa's squad to tour Zimbabwe.
Mohammad Yousuf's unbeaten century spurred Pakistan to an emphatic win over South Africa in the second one-day international in Durban on Wednesday.
South Africa were 131 for 5 at the close on Day 1 of the third Test, after dismissing Pakistan for 157.
All rounder Shaun Pollock and fast bowler Andre Nel would be rested and replaced by all rounder Andrew Hall and fast bowler Dale Steyn in the third and final Test against Pakistan.
The home team totalled 331 in their second innings before Pakistan, chasing 191 to win, reached the close on eight for nought.
At tea South Africa were 277 for six, a lead of 136. Pakistan were dismissed for 265 in reply to South Africa's first innings of 124.
Umpire Daryl Harper said India should have known that Sachin Tendulkar was not permitted to bat early on the fourth day of the third and final Test against South Africa on Friday.
India's Wasim Jaffer was grateful for a familiar pitch and the faith shown in him after he scored his third test century on Tuesday in the third and final Test against South Africa.
South Africa have omitted spinners from their squad, confirming that they will attack the Indians with an all-pace attack in the first Test.