I can't see any pictures/attachments, but from past history I've found there are two a seeds.
1. You just knit the 3rd row for the complete decrease, or
2. You use row 1 of the pattern for the 3rd row.
If your pattern has you continue the "3 row" pattern, remember that the even numbered to e you STIL! FOLLOW YOUR REGULAR 2-ROW PATTERN only inverting the rows -- following?ow Row 2 AND THEN Row 1. Essentially, you are now simply following 2 PATTERNS AT ONCE.
It's easy, don't worry about it ,-- it all works out fine!