Was princess of wales diana's funeral attended by current queen mum?

Yes, but the Queen Mother died some years ago, so is not the current Queen Mum. Elizabeth II has been for 60 years a Regnant ( ruling) Queen, as distinguished from a Queen Mother or a Queen Consort. Queen Mary of ocean Liner fame was a Queen Consort, so it is incorrect, though people do it, to style her as (Queen Mary III). Mary died on 3.25.53 .