How Long Can Ruptured Saline Implants Stay in my Body?

I agree with the answer below- tightening of the connective tissue pocket around your implant will progress with time.
While this is possible to improve at surgery, the chances of you achieving an excellent outcome and symmetry are higher if you have this managed sooner rather than later.
Having said that, there should be no risk to your health if you are unable to deal with this immediately.

It's best to replace a ruptured saline implant within the first month after the rupture. If you wait longer, the overlying skin and the capsule around the implant will begin to shrink. It becomes more difficult to perform the surgery and to get good symmetry when the implant has been ruptured for a long time.

If you have a rupture or another complication, the first thing you should do is see your doctor and have them examine you.
As a medical doctor concerned with the safety and health of a patient, the best answer for you is to have it taken care of as soon possible by your doctor.
There are technicalities surrounding how long it can be in your body, but that is not proper medical care.
I hope that answers your question on your ruptured implant. It’s great that you’re doing this research. I always say that the best patients are informed patients.
You might also want to research your options for when you have your current implant replaced. Choosing the right implant is the number one concern among women considering breast augmentation. Did you know, there’s actually a way to select a implant shape, size, and profile that is perfect for you?
A term that I use with my patients for the perfect implant is the “Pony Implant”.
So what do I mean by “perfect”? Well, a Pony Implant has three qualities to it. First, the implant meets your beauty goals. For example, you want to your breasts to look fuller while still appearing natural.
Second, when you chose your Pony Implant, you walk out of your consultation 100% confident that you’ve chosen the right shape and size for you. In other words, you won’t be second guessing your decision, and you won’t be afraid of having gone too big or too small.
And third, after your procedure, you are thrilled with your results, and say, "I’m so happy. This is exactly what I wanted!"
That’s the Pony Implant. And the great news is that there is a simple process to go about finding yours.
This issue of selecting the right implant is so important when it comes to patient satisfaction or dissatisfaction that, again, I really encourage you to learn more about it.
Thank you for reading and best of luck on your journey!