One of the cheapest cameras available with an APS-C-size sensor, the A3000 unsurprisingly delivers excellent low-ISO sensitivity photo quality for the price. You can start to see some initial detail degradation at ISO 800 in the shadow areas, but it's still pretty good.
ISO 1600 is probably the highest I'd go with this camera, but for the money that's extremely good. Beyond that, you can see significant artifacts in all areas, and by ISO 6400 you lose quite a bit of detail.
This shot frequently displays some degraded edge detail and blown out highlights at ISO 800, but the A3000 handles it very well. You can see a bit of ringing on the text edges, but it's more than acceptable.
(1/80 sec, f4, pattern metering, AWB, ISO 800, 18-55mm lens at 18mm)