Get high-quality reps out of a small group. Pass firmly into the wall player, set it first time into the runner's stride rather than his feet, and finish early, rotating roles so everyone does all three jobs.
Set a start cone, a wall player to one side and a goal. The starter passes into the wall player, who sets it first time into the path of the third player running through to finish. Rotate one role each repetition: starter to wall, wall to runner, runner to starter. Run it from both sides so the setting foot changes. With four or five players simply add another starter and keep the rotation going.
Bad turnout is the most common problem in grassroots coaching and almost nobody publishes a session for it. Three players arrive, the plan needed twelve, and the coach improvises something apologetic. That is a shame, because three is genuinely enough, and a session built for three delivers repetition counts a full squad never sees.
The arithmetic is the point. In a twelve-player version of this pattern, each player gets perhaps six repetitions in twenty minutes. With three, everybody touches the ball on every single rep and rotates through all three jobs, which means roughly thirty involvements each. That is not a compromise on a proper session, it is a better one for anything technical.
The pattern itself is up, back and through. A firm pass into the wall player's back foot, a first-time set into the runner's stride, and an early finish. Each job is genuinely different, which is why rotating matters: the player who sets the ball is learning something the runner is not.
The pass into the wall player is the one that decides everything downstream. Into the back foot, meaning the one further from an imagined defender, so he can set it forward without turning. Played to the wrong foot he has to adjust, the set goes backwards, and the runner arrives to nothing.
Setting first time is non-negotiable and it will be the hardest instruction to hold. A control touch feels safer and it kills the timing of a run that has already started.
Build in real rest. With three players nobody hides, and twenty minutes is more demanding than it looks on paper.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.