West
♠ A93
♥ KQ6
♦ 8652
♣ 1076
Pass
2S
4S
♠ A93
♥ KQ6
♦ 8652
♣ 1076
Pass
2S
4S
East
♠ K7654
♥ J
♦ AJ3
♣ AQ53
1S
3C
Pass
♠ K7654
♥ J
♦ AJ3
♣ AQ53
1S
3C
Pass
This game had no chance on the diamond lead, though it seemed reasonable for West to accept with 9 points.
The problem is that the side suits did not fit well. If you switch West's heart honors to the minor suits then game is a favorite.
The solution is to understand that the side suit bids, which I call "fragment" bids, show one or more high cards in the bid suit. So what West might do is realize that the 3♣ call did not improve the hand, and try 3♥ to show a fragment in hearts and deny one in diamonds. The idea is to bid them up-the-line as long as a decision is not clear.
The 3♥ call would be discouraging for East who would then be able to sign off at 3♠.