Unfortunately, things may not be quite so straightforward as they initially appear.

The "9-Monatszahlen" are *not* the figures for the third quarter of the FY, but the figures for the *first nine months* of the FY, i.e. the cumulative year-to-date figures at the end of the first nine months/end of third quarter. These are frequently abbreviated in English (especially in analyst reports, that sort of thing) to "9M" figures.

Of course these figures *include* the Q3 (or: 3Q) figures, but they also include the Q1+2 (1+2Q) figures as well.

German companies that publish quarterly interim reports (mainly companies listed in the Prime Standard) include in their reports on the first nine months:
1) the cumulative YTD figures with the corresponding comparatives (either the previous year's cumulative Q1-3 or the previous FY year-end figures)
2) the Q3 figures with the year-on-year comparatives (previous year's Q3)

It can sometimes be difficult to separate the two sets of figures in poorly written German 9M reports, but that's part-and-parcel of translating...