The world champions were sent packing by Switzerland at the round of 16 stage last June, after Mbappe’s spot kick was saved by Yann Sommer.
French Football Federation president, Noel Le Graet, claimed that the Paris Saint-Germain star was thinking about retiring from international football afterwards because of the lack of support he received following the crucial penalty miss.
But Mbappe has said it was because of the racial abuse he received rather than solely because he was not supported after his miss.
The 23-year-old wrote: “Yes finally I explained to him (Le Graet) above all that it was in relation to racism, and NOT to the penalty.
“But he considered that there had been no racism…”