At 8-under-par 208, she will take a one-shot over Se Ri Pak (67) and Karrie Webb (70) into the final round at the Hiddenbrooke Golf Course in Vallejo, Calif., while Emilee Klien is three back at 5-under following a day-low 65.
Delasin got the ball rolling early on Day 3, sinking a birdie at the par-4 1st. She slipped with a bogey at No. 5, but managed to sandwich it with birdies at the fourth and sixth.
From there, it was a string of pars until the closing stages of the round, when Texas native made birdie at No. 15 and added two more closing red numbers at the 17th and 18th for 67.
In her second full year on the LPGA Tour, Delasin is searching for her third win.
She took her first victory last season at the Giant Eagle LPGA Classic, and then successfully defended that crown just last July.
Now she is looking to branch out a bit.
Behind her are two of the most imposing figures in the womens game, however.
Webb is coming off a 2000 campaign in which she took seven titles, and has won two majors this year.
Meanwhile, Pak has won five times in 2001, including last week at the AFLAC Champions, where she ended five shots clear of the field.
Likewise with Delasin, the young South Koreans round on Saturday was flawless, consisting of five birdies against no bogies.
Defending champion Juli Inkster gave herself a smidge of hope on Saturday, as her third-round 68 saw her move into outright fifth at 4-under-par.
For leading money winner Annika Sorenstam , however, she still has not found her stride, shooting a 71 on Saturday to remain at even-par for the tournament.
Tomorrows eventual champion will be awarded $154,000. The Samsung World Championship is one of the last stops on the 02 LPGA Tours schedule and is in its 21st season this year.
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