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We extend Struwe's result (Acta Math., 1988) on the existence of freeboundary constant mean curvature disks to almost every prescribed boundarycontact angle in $(0, \pi)$. Specifically, let $\Sigma$ be a surface in$\mathbb{R}^3$ diffeomorphic to the sphere, and let $\Sigma'$ be a convexsurface enclosing $\Sigma$. Given $\tau \in (-1, 1)$ and a constant $H \geq 0$below the infimum of the mean curvature of $\Sigma'$, we show that for almostevery $r \in (0, 1)$, in the region enclosed by $\Sigma'$ there exists abranched immersed disk with constant mean curvature $rH$ whose boundary meets$\Sigma$ at an angle with cosine value $r\tau$. Moreover, the constant meancurvature disks we construct have index at most $1$.

Existence of constant mean curvature disks in $\mathbb{R}^3$ with capillary boundary condition