Half life of furosemide
is about 100 minutes. That means that in 100 minutes, half the drug is cleared.
It takes 5-6 half lives for a drug to be out of your body; so for lasix/furosemide, that would be 600 minutes or 10 hours. Thus, you should be clear by Tuesday morning and Tuesday afternoon for sure.
Let me know if you need any more clarifications.