Munster staged a heroic fight back as a JJ Hanrahan try, which was converted by Ian Keatley ensured the game ended 25-25 at Parc y Scarlets.
Munster were 25-13 behind with only four minutes remaining when Felix Jones' try signalled the start of the comeback and Foley had mixed emotions with the result.
"You don't know whether to laugh or cry," he said.
"I thought at one stage we conceded 10 points far too easily. We'd gone ahead, and worked hard to get ahead, and obviously we had a lot of possession in the game.
"To fall behind so quickly, and to fall nine, to 12 points behind, with the clock running out, was hard to take."
Scarlets are undefeated at home in the GUINNESS PRO12 since Boxing Day 2013 and Munster had not won away to Scarlets since December 2011 when Hadleigh Parkes touched down with over an hour of the game gone.
Scarlets fly-half Steve Shingler added 20 points with his boot and, despite the hard-fought draw, Foley insists there is plenty of work to do ahead of the clash with Glasgow next weekend.
"We just get on now for next week, with the view that, you know, in this block we still haven't been beaten," Foley added.
"I think the boys are showing that character.
"We've a fortnight of hard work, but we'll look at Glasgow now, and make sure we're focussed and ready, and see what way the boys turn up tomorrow after a very physical hit-out today.
"Glasgow and ourselves went toe to toe up there as well, and we ended up losing by three points in a game that possibly, you know, we left behind us."
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