Larsen went into a slump beginning with the 1958 Interzonal. He tied 5th–6th in a strong field at Zürich 1959 with 9½/15, behind winner Tal, Gligorić, Paul Keres, and Bobby Fischer. But Larsen placed only 4th in a middle-range field at the 1960 Berg en Dal Zonal 1960 with 5½/9, and did not advance to the Interzonal. He recovered by sharing 1st–2nd places at Beverwijk 1961 on 7½/9 with Borislav Ivkov. At Zürich 1961, he tied for 6th–7th places with 6/11, as Keres won ahead of Tigran Petrosian. At Moscow 1962, he shared 7th–11th places with 7½/15 (Yuri Averbakh won).