He asks: “Is there karma involving my parents? I have never met them and grew up in foster care. Why were they kept from me?”

This is mostly due to their karmic baggage and not yours. But there is a long saga in having had difficult parents in other lifetimes. So this is a continuation of that dilemma in being faced with an early life challenge of seeming abandonment. As you know in reaching adulthood, there are many reasons for why people cannot face becoming a parent or may be denied the privilege in being manipulated or harmed in ways that make them unavailable. We do not describe such karmic histories in detail for people because it is difficult to fully grasp and understand and separate levels of responsibility, and have a true sense of what the karmic potentials might still be in the possible consequences. All have been through many tragedies. To know it all would be to live under a  very large cloud of negativity, and that would be a burden that is not necessary, as sometimes ignorance is truly bliss, akin to the naïveté of the young who have not yet been roughed up by life. It is better to stay that way as long as one can. The key thing to know here is this does not taint you. It does not mean, at all, you are less worthy, less desirable, or less likely to be loved and accepted by others and have a stable life, and environment, and long-term relationships. Your youth is a separate chapter in your case and will not be controlling things going forward.