Scots Hannah McCook, Alison Muirhead, Heather Stirling and Rachael Taylor look set to qualify for the Final Stage of the Lalla Aicha Tour Qualifying School over five rounds from December 16 to 20 in Morocco.
But Kimberley Beveridge needs a spectacular finish if she is to make up enough ground from her joint 55th position.
McCook, Muirhead, Stirling and Taylor should figure among the leading 38 and ties who will advance from the current pre-qualifying eliminator at Amelkis Golf Club after Monday's final round.
Muirhead is joint ninth on 210; Taylor T15 on 212; Stirling T21 on 215 while McCook shot one of the third day's best rounds - a six-under-par, seven-birdie 66 - for joint 30th place on 216.
Sweden's Linnea Storm leads the field by seven shots from Ireland's Leona Maguire after a brilliant six-under 62 for a 54-hole tally of 197.
Aboyne's Kimberley Beveridge looks out of contention for qualifying after a 75 (38-37) for 228 and a share of 55th place in a field of 70.
LEADERBOARD
par 216 (3x72)
197 L Strom (Swe) 66 69 62
204 Leona Maguire (Ire) 70 66 68
2
05 N Dreher (Aut) 66 68 71.
SELECTED SCORES
210 A Muirhead (Sco) 68 70 72, G Price (Eng) 72 70 69 (T9).
212 R Taylor (Sco) 66 72 74, C H Leathem (Eng) 68 68 76 (T15).
215 H Stirling (Sco) 72 72 71, S Lamb (Eng) 74 69 72 (T21)
216 H McCook (Sco) 73 77 66 (T30)
219 S-J Boyd (Eng) 71 76 72 (T35)
221 Lisa Maguire (Ire) 74 71 75 (T39)
228 K Beveridge (Sco) 79 74 75 (T55)
235 A Plumb (Eng) 76 82 77.
Leading 38 and ties after Round 4 advance to the Final Q School over five rounds in Morocco from December 16 to 20.