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We present the spectral analysis of three  Suzaku  X‐ray Imaging Spectrometer observations of 3C 111 requested to monitor the predicted variability of its ultrafast outflow on ∼7 d time‐scales. We detect an ionized iron emission line in the first observation and a blueshifted absorption line in the second, when the flux is ∼30 per cent higher. The location of the material is constrained at &lt;0.006 pc from the variability. Detailed modelling supports an identification with ionized reflection off the accretion disc at ∼20–100 r  g  from the black hole and a highly ionized and massive ultrafast outflow with velocity ∼0.1 c , respectively. The outflow is most probably accelerated by radiation pressure, but additional magnetic thrust cannot be excluded. The measured high outflow rate and mechanical energy support the claims that disc outflows may have a significant feedback role. This work provides the first direct evidence for an accretion disc–outflow connection in a radio‐loud active galactic nucleus, possibly linked also to the jet activity.

X‐ray evidence for the accretion disc–outflow connection in 3C 111