NORTH
 AT5432
 AT8
 J832
 
 K
 KQJ
 AKQT94
 876
  QJ9876
 976
 765
 J
   
 5432
 
AKQT95432
 
Dealer: West    Vul: EW   MP Scoring

West
1
2
3
Pass

North
1
Pass
Pass
Pass

East
Pass
Pass
Pass
Pass

South
2
3
3

 Two Voided Nine Card Suit 

West began the defence with a top diamond, ruffed by declarer.
Assuming West, at unfavourable vulnerability to have 6+ diamonds, East was a favourite to have the long side of an expected 4:2 heart division.
Declarer tried two top clubs, East ruffing the 2nd and returning the Q, ruffed in hand, West playing the ominous looking K.
There seemed to be little better for declarer than trying to shorten East's expected long trumps and a 3rd club was led and ruffed by East.
Another spade was led and West's ruff signalled an original holding of 3 clubs, 1 spade, 6 or 7 diamonds and 3 or 2 hearts.
East's K diamond continuation was ruffed.
Dummy's A and another heart left West to lead away from nothing but diamonds, endplayed.

South ended up down 1, losing two East club ruffs, two West hearts and a top diamond.

South's original 2 bid was forcing and suggested 12+ points.
At North's 2nd turn, over West's 2 bid, a 4 card heart suit could have been shown.
Does your partnership preclude the showing of 4 card 2nd suits if holding a minimum?
Perhaps South should have had instead 7 or more clubs and 5 or more hearts for such a bid as 3.

After South freely bids the forcing 2 and the non-forcing, and not forced, 3, perhaps North should double at favourable vulnerability.
When North doesn't double, perhaps South should mark North with a higher probability of having the points requisite for the 1 overcall in hearts and spades, which makes better the possibility of, in addition to 9 clubs tricks, perhaps some combination of  AA  or  AKx(x)  or  AJx  or  AQ

As that probability increases, the idea of trying a 4:3 fit in a tenuous 3 contract when at least 4 can be made, with 9 clubs, is one of the silliest twists of matchpoint scoring.
One so seldom gets 9 card suits, how can one bypass playing in the suit to try a 4:3 fit with such a rotten 4 card suit?