Having previously raced in the now defunct W Series, the 18-year-old finished seventh in the first season of the F1 Academy this term.
Bustamante was caught liking a post with a screenshot of her being called overrated and captioned with an offensive ableist remark against Stroll.
Bianca Bustamante is part of McLaren's young driver development programmeBianca Bustamante has been competing in the F1 Academy seriesBianca Bustamante has apologised after liking an offensive social media post against Lance Stroll
Bustamante apology
After the post was removed a few hours later following a social media backlash, the Filipina driver issued her apology.
"I truly deeply apologise. I own up to mistakes having liked an inappropriate tweet, I can't believe all the people whom I have hurt," she wrote.
"I was scrolling and accidentally liked the tweet, once I discovered that later on, I immediately unliked it.
As someone who grew up with my only brother having Autism, I completely understand the challenges faced by anyone with Autism.
"I would never in a million years support Ableism at any level, let alone support an Ableist tweet against a fellow driver.
"I take the topic of Autism very seriously and very personal.
"To Lance Stroll and anyone that this has offended, I sincerely apologize as these types of comments is something I do not support.
"I hope the racing community understands this is 100% an accident, my sincerest apologies for this big mistake."
The McLaren driver then shared a video of her alongside her brother.
I rarely share so much about my personal life. But if there’s one thing that kept me going, it was my brother...