Olympic medallist P V Sindhu is also missing in action as she recovers from an injury.
Bornil Aakash Changmai became only the second Indian shuttler to win a gold medal in the Under-15 boys' singles category.
Rankireddy and Shetty won 21-12, 21-16 in a quarterfinal match that lasted 49 minutes.
Overall, Anupama is only the sixth Indian shuttler to top the junior rankings.
Tokyo Olympian B Sai Praneeth will lock horns with Japan's Koki Watanabe, while Sourabh Verma faces France's Toma Junior Popov.
Bansod took just over half an hour to dispatch 16-year-old Tasnim in the pre-quarterfinals
The selectors had also proposed to pick one pair each for men's and women's doubles and two mixed doubles combinations through a round-robin tournament format to decide the final standings.
The other men's singles semi-final match on Saturday will be played between Priyanshu Rajawat and Kaushal Dharmamer.
PM Modi met in person and interacted with the badminton squad
The celebration of this historic feat was not yet over when Indian shuttlers scripted yet another jaw-dropping show in Birmingham, returning with six medals, including three golds, a silver and two bronze medals in August.